Olivia Wilde shows off growing baby bump in black bikini

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Olivia Wilde Rocks Tiny Baby Bump on Vacation in Hawaii -- See the Pic!


And baby bump makes (almost) four!

Olivia Wilde announced last week that she and fiancé Jason Sudeikis are expecting baby No. 2, and the Vinyl actress showed off her growing bump in a black bikini during a beach day with her family in Maui, Hawaii over the weekend.

EXCLUSIVE: Jason Sudeikis Jokes About His Son Otis' Big Mother's Day Plans for Olivia Wilde

Wilde waded in the water while Sudeikis played with their 2-year-old son, Otis, in the sand. She also posted an Instagram from their vacation of her adorable little boy relaxing near an outdoor tub.

Bath time.

A post shared by Olivia Wilde (@oliviawilde) on

Wilde and Sudeikis have been together since December 2011 and got engaged in January 2013. As for when the couple will tie the knot, Sudeikis recently joked on Watch What Happens Live! that he and Wilde are waiting "until weed is legal in every state!"

The Mother's Day actor also recently opened up about his "humdinger" of a first kid and wanting more. Find out what he exclusively told ET in the video below.

Jason Sudeikis on Having More Kids: It's About 'Being with the Right Person'

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