Olivia Wilde says getting ''knocked up'' has improved her skin.

The 'Drinking Buddies' star - who had her first son, Otis, with her fiancé Jason Sudeikis in April last year - admitted getting pregnant has been a blessing in more ways than one as it left her with a constantly glowing complexion.

When asked to share her skincare secret, Olivia told InStyle magazine: ''Get knocked up! That's my skin care regimen.

''Babies are really good for your skin. Having a kid is really good for your skin. I feel like my skin has been much better [since having a baby].''

While the brunette beauty loves staying at home with her baby boy, she previously expressed her desire to be a ''modern mother'' by making sure she still goes out and has fun with her friends.

She said as she attended the CFDA Fashion Awards with shoe designer STUART WEITZMAN last year: ''The great thing about being a modern mother is that you can balance having fun and being a great mom, and I had a great example of that in my own mom, so here I am following in her footsteps.

''This is great. This is really my first time coming out since I gave birth and I thought what a wonderful event to come out for and what a wonderful date to have.''