Kristen Bell's co-star found it a "little awkward" shooting sexy scenes with the pregnant actress.

Adam Brody, who guest stars in House of Lies alongside the blonde beauty, has revealed he initially found it strange filming steamy scenes for the dramatic comedy while she is expecting her first child but that she helped him to feel more comfortable.

The 33-year-old actor, who is dating former Gossip Girl star Leighton Meester, told EOnline.com, "She was very pregnant. I like to say it was sort of a three-person scene. If it wasn't Kristen, it would have been incredibly awkward. Well, it was still a little awkward, but she's just such a warm and open friendly person."

The former Veronica Mars actress is expecting her first child with fiance Dax Shepard and while she can't wait to become a mom, Kristen recently admitted she is also a little nervous.

"I'm gathering advice from everyone. I have a lot of friends with kids and work with a lot of people with children, so I'm just asking what's their best bit of advice. The nice thing is that, hands down, every person I know that has ever had a kid has looked at me with confidence and said, 'Oh, this is the best thing you'll ever do with your entire life.' So, that's nice to know," she previously said.