Carey Mulligan Is Pregnant, Expecting Third Baby with Husband Marcus Mumford

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Carey Mulligan is expanding her family!

The actress, 37, is pregnant and expecting her third baby with husband Marcus Mumford, a rep for the star confirms to PEOPLE.

Mulligan and her Mumford & Sons frontman beau, 35, are already parents to daughter Evelyn Grace, 7, and son Wilfred, 5.

The star stepped out on Friday night at the AFI Awards, where her film She Said was honored as one of the year's best.

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RELATED: Carey Mulligan and Marcus Mumford's Relationship Timeline

After a five-month romance, Mumford and Mulligan became engaged in August 2011, and then got married on a farm in Somerset, England, with approximately 200 guests in attendance, including famous friends like Sienna Miller, Jake Gyllenhaal and Colin Firth, in April 2012.

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The couple welcomed their daughter on Sept. 15, 2015, and later their son in August 2017. At the time of her daughter's birth, Mulligan joked that the lessons she would impart to her were "no makeup, no piercings, no tattoos."

RELATED VIDEO: Carey Mulligan Steps Out at TIFF After Welcoming Second Child with Husband Marcus Mumford

Last year, Mulligan chatted with PEOPLE about her role in the film She Said and opened up about her experience coping with postpartum depression after the birth of her first child.

In the film, Mulligan plays New York Times investigative reporter Meghan Twohey, who, with journalist Jodi Kantor (played by Zoe Kazan), published a bombshell Harvey Weinstein investigation in 2017 that would go on to spur a worldwide #MeToo reckoning.

When Twohey took up the towering investigation with Kantor, she was on maternity leave coping with postpartum depression, and Mulligan told PEOPLE: "One of the parts of the script that hit me initially the most was Megan's experience with postnatal depression. I had a very similar experience with my first child seven years ago, and felt very alone, and very scared, and also very confused by the whole experience."

For Mulligan, "it was really going back to work in some form," shooting the 2015 film Suffragette, "that was the thing that got me on the road to finding myself again with incredible support around me."