Sam Asghari looking forward to fatherhood as Britney Spears announces she's pregnant

The Iranian personal trainer says he doesn't take the job lightly

Britney Spears and Sam Asghari at the Glaad Media Awards at The Beverly Hilton Hotel in April 2018. Getty Images

Britney Spears and Sam Asghari, with her sons Sean Federline and Jayden James Federline, attend a basketball game between the Los Angeles Lakers and the Golden State Warriors in November 2017. Getty Images

Britney Spears and Sam Asghari arrive at the premiere of Once Upon a Time ... in Hollywood at the TCL Chinese Theatre in July 2019. AFP

Britney Spears and Sam Asghari attend the 2019 Daytime Beauty Awards. AFP

Sam Asghari wearing Zuhair Murad's Rise from the Ashes T-shirt in August 2020. Sam Asghari / Instagram

Sam Asghari in Britney Spears's 2016 Slumber Party video. YouTube

Sam Asghari and Camila Cabello in Fifth Harmony's Work From Home video in February 2016. YouTube

Britney Spears and Sam Asghari in January 2020. Sam Asghari / Instagram

Sam Asghari as a child, with his parents. Instagram / Sam Asghari

Sam Asghari attends the Can You Keep A Secret? premiere in August 2019. Getty Images

Britney Spears announced that she and Sam Asghari are expecting a baby, and her fiance couldn't be happier about it.

A few hours after the singer's Instagram post on Monday, telling fans she's pregnant with her third child, the Iranian personal trainer sent out his own message to the world on the social networking platform.

"Marriage and kids are a natural part of a strong relationship filled with love and respect," he wrote next to a watercolour painting of a family of lions.

"Fatherhood is something I have always looked forward to and I don’t take lightly. It is the most important job I will ever do."

Spears, 40, said she took a pregnancy test after noticing weight gain after a trip to Maui, Hawaii.

"I thought, 'Geez … what happened to my stomach?" the singer wrote on Instagram.

"My husband said: 'No, you’re food pregnant, silly'."

This will be Spears's third child and first with Asghari. The Toxic singer had her first two sons — Sean Preston, 16, and Jayden James, 15 — with Kevin Federline.

Spears lost custody of her two sons in 2007, and a year later reportedly suffered a breakdown after a confrontation with the paparazzi.

In her latest post, she said she won't be going out as much to avoid paparazzi while she's pregnant. "It’s hard because when I was pregnant I had perinatal depression … I have to say it is absolutely horrible … women didn’t talk about it back then."

Asghari, 28, was born in Tehran, Iran, but moved to the US to be with his father when he was 12 years old.

The couple met in 2016, on the set of Spears's Slumber Party video. Asghari plays the singer's mysterious love interest in the music video set in an old mansion, which is being used as a nightclub.

In September, they announced they were engaged, again on Instagram. "I can't believe it," she wrote, with a series of diamond ring emojis.

Scroll through the photo gallery below to see Britney Spears's style evolution:

Britney Spears, in a pink sheath dress, attends the American Music Awards on January 26, 1998 at the Shrine Auditorium, in Los Angeles, California. Getty Images

Britney Spears, in black trousers and a cropped short-sleeved top, attends a Tommy Hilfiger party on July 7, 1999 in New York, US. Getty Images

Britney Spears, in a frilled pink cropped top, attends the Silicon CDDB Awards in Los Angeles, California, on August 3, 1999. Getty Images

Britney Spears, in sequinned trousers, attends the Teen Choice Awards in Los Angeles, California, on August 1, 1999. Getty Images

Britney Spears, in a metallic jacket and lizard-print trousers, attends the MTV Video Music Awards in New York, US, on September 9, 1999. Getty Images

Britney Spears, in a spaghetti-strapped dress and pashmina, attends the Billboard Music Awards in Las Vegas, Nevada, on December 8, 1999. Getty Images

Britney Spears, in embroidered flares and a halter-neck, attends a Grammys photo shoot in Los Angeles, California, on February 21, 2000. Getty Images

Britney Spears, in Randolph Duke, arrives at the 42nd annual Grammy Awards in Los Angeles, California, on February 23, 2000. Getty Images

Britney Spears, in a fringed pink mini, attends the Teen Choice Awards in Santa Monica, California, on August 6, 2000. Getty Images

Britney Spears, in an orange and pink lace-trimmed coat with matching fedora, attends the Billboard Music Awards in Las Vegas, Nevada, on December 5, 2000. Getty Images

Britney Spears and Justin Timberlake, in matching double denim, arrive at the 28th annual American Music Awards at the Shrine Auditorium in Los Angeles, California, on January 8, 2001. Reuters

Justin Timberlake and Britney Spears, in a light taupe slip dress, attend an event at the Regent Beverly Wilshire Hotel in Beverly Hills, California, on April 1, 2001. Getty Images

Britney Spears, in a strapless denim dress and polka-dot blouse, attends a photo call for the film 'Crossroads' in Amsterdam, the Netherlands, on March 19, 2002. EPA

Britney Spears, in a sheer blouse and patterned skirt, attends a photo call for 'Crossroads' at Hotel Palace on March 21, 2002 in Madrid, Spain. Getty Images

Britney Spears, in an asymmetric silver dress, arrives at the premiere of 'Crossroads' on March 25, 2002 in London, England. Getty Images

Britney Spears, in jeans and a lace blouse, attends the premiere of 'Crossroads' at Fox Studio in Sydney, Australia, on April 18, 2002. Getty Images

Britney Spears, in stripes and cowboy boots, attends a Barbie Award ceremony on April 21, 2002 in Tokyo, Japan. Getty Images

Britney Spears, in a nude-toned slip dress, poses with one of her outfits which will be auctioned for charity during a press preview in New York, US, on May 22, 2003. EPA

Britney Spears, in a white corseted dress, attends the MTV Video Music Awards at Radio City Music Hall in New York, US, on August 28, 2003. EPA

Britney Spears, in jeans and a faux fur jacket, attends a Hollywood Walk of Fame ceremony in Los Angeles, California, on November 17, 2003. EPA

Britney Spears, in a fluffy oversized jacket and jeans, attends a press conference to promote her album 'In the Zone' on December 12, 2003 in Tokyo, Japan. Getty Images

Britney Spears, in Roberto Cavalli, arrives at the NRJ Music Awards at the Palais des Festivals on January 24, 2004 in Cannes, France. Getty Images

Britney Spears, in a satin skirt suit, attends the Baby Phat fashion show at Mercedes-Benz Fashion Week in New York, US, on February 2, 2007. Shutterstock

Britney Spears, in a white mini and straw trilby, arrives at the opening of LAX Nightclub at the Luxor Resort & Casino on September 1, 2007 in Las Vegas, Nevada. Getty Images

Britney Spears, in a feather-trimmed bodysuit, attends the Bambi Awards on November 27, 2008 in Offenburg, Germany. Getty Images

Britney Spears, in a shimmering LBD, arrives at the Teen Choice Awards at Gibson Amphitheatre on August 9, 2009 in Universal City, California. AFP

Britney Spears, in a pink chiffon mini dress, attends the premiere of 'Toy Story 3' on June 13, 2010 at the El Capitan Theatre in Hollywood, California. Shutterstock

Britney Spears, in Moschino, and Jason Trawick attend the MTV Video Music Awards at the Nokia Theatre in Los Angeles, California, on August 28, 2011. EPA

Britney Spears, in Topshop, attends her UK tour launch party at Sanctum Soho on September 16, 2011 in London, England. Getty Images

Britney Spears, in Herve Leger, and her son, Sean Federline, attend the premiere of 'Smurfs 2' in Westwood, California, on July 28, 2013. EPA

Britney Spears, in Mikael D, attends the 40th People's Choice Awards at the Nokia Theatre in Los Angeles, California, on January 8, 2014. EPA

Britney Spears, in Tadashi Shoji, promotes her Dessous collection, The Intimate Britney Spears, at Gatta boutique in Warsaw, Poland, on September 24, 2014. EPA

Britney Spears, in Michael Costello, promotes her Dessous collection, The Intimate Britney Spears, at Centro mall on September 25, 2014 in Oberhausen, Germany. Getty Images

Britney Spears, in Yousef Al Jasmi, arrives for the Billboard Music Awards at the MGM Grand Hotel and Casino in Las Vegas, Nevada, on May 17, 2015. EPA

Britney Spears, in Mikael D, attends the Teen Choice Awards at the Galen Centre in Los Angeles, California, on August 16, 2015. EPA

Britney Spears, in Labourjoisie, attends the 32nd MTV Video Music Awards at the Microsoft Theatre in Los Angeles, California, on August 30, 2015. EPA

Britney Spears, in Julien MacDonald, attends the 33rd MTV Video Music Awards at Madison Square Garden in New York, US, on August 28, 2016. EPA

Britney Spears, in Nookie Charm, and Sam Asghari attend the premiere of 'Once Upon a Time... In Hollywood' at the TCL Chinese Theatre in Los Angeles, California, on July 22, 2019. EPA

Asghari has spoken about wanting to grow his family with Spears in the past. "My priorities in life are to remain humble and understand where I came from and where I'm going," he told Forbes.

“I want to take my career to the next step when it comes to acting. I want to take my relationship to the next step as well. I don’t mind becoming a father. I want to be a young dad.”

In November, after her 13-year-long conservatorship finally ended, Spears said she wanted another child. She posted a black-and-white Instagram photo of a baby standing on their toes, writing in the caption: “I’m thinking about having another baby !!! I wonder if this one is a girl … she’s on her toes reaching for something … that’s for sure!!!!⁣”

In February, Spears signed a book deal for a reported $15 million, which is said to chronicle her life before and during her conservatorship.