The 54-year-old actor walked the red carpet at the Los Angeles premiere of his new movie 'Unfrosted' on Tuesday (30.04.24) with spouse Brittany Lopez, and the 35-year-old beauty's growing bump was clear to see in her floral off-the-shoulder gown.
The couple are already parents to a four-year-old daughter, who they welcomed into the world four years ago, while the 'Interview with the Vampire' actor is also dad to Jaden, 25, and Eliana, 22, who he has with ex-wife Ryan Haddon.
Christian previously joked about how parenting had become more "complicated" in the time between having his second and third children.
He told 'The Late Late Show' host James Corden in 2019: "I thought your kid could get a couple of germs and be fine, build up the immune system. But now you have to wash everything.
"The bottles, they break down into eight different pieces, and it's a puzzle you have to put together. I got dish gloves on, I'm just washing these bottles."
The 'Mr. Robot' actor quietly wed Brittany in December 2013 after dating for three years, and celebrated their engagement on New Year's Eve in 2012, with a large bash attended by 200 people.
The actor admitted at the time: "We had a big engagement party on the 31st of December and it was nice, it was like a New Year's and we had all the family come, 200 people, so it kind of already feels like we did the wedding, so we are just going to do a nice backyard situation."
The pair met in 2010, and Christian previously revealed he originally believed she was a lesbian, as he thought he'd seen her propose to another woman.
He explained: "This girl came walking along with another lady, a slightly older lady, and I was sitting in my usual spot eating my oatmeal that morning. So I'm a filthy old man eating my oatmeal and she comes walking along. This spot, I guess, was famous for people proposing to each other, actually. It was very, very nice. So she's there with this old lady and, next thing I know, she gets down on one knee and proposes to this older lady ... I'd seen a lot of crazy stuff down in the Florida Keys! I of course was very intrigued and I went over and sat down in my other usual spot.
"I thought I'd just witnessed a nice lesbian engagement so I was coming over to say congratulations. But it turns out it was her aunt and she was just trying to help her aunt capture the beauty and the romance of the park ... The next thing I knew, we were hanging out in the Everglades."