Claire first announced that she and husband Hugh Dancy were expecting their second child together back in April.
She announced her pregnancy quite late, as the former My So-Called Life star revealed that she was deep into her second trimester.
Claire stepped out, bump and all, at this year's Vulture Festival in New York City over the weekend, which hosted some of the brightest stars in television and movies including Ava Duvernay and Wendy Williams.
She looked gorgeous for the big day ahead in her floral dress and heels.
She was there to promote her upcoming film A Kid Like Jake with costars Jim Parsons, Silas Howard and Daniel Pearle. Will she be inviting The Big Bang Theory star to her eventual baby shower as well?
Are you a fan of Claire's colorful maternity dress? Sound off in the comments!