Grey’s Anatomy actress Chyler Leigh is going to be a mommy again!

The actress, 26, and her actor/musician husband, Nathan West, 30, are expecting their third child, her rep confirmed to Usmagazine.com on Monday.

“She is a little over four months pregnant,” her rep told Us. “Grey’s won’t be writing her pregnancy into their storyline.”

The couple are parents to Noah Wilde, 5, and Taelyn, 2.

Leigh plays Dr. Lexie Grey, the neurotic half-sister of Dr. Meredith Grey (Ellen Pompeo) on the hit ABC hospital drama.

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A video has hit the Web showing Grey’s Anatomy newcomer Chyler Leigh, who plays Meredith’s neurotic half-sister Lexie, kissing her older brother.

Internet-savvy Grey’s fans have discovered footage of the then 15-year-old star’s inaugural movie role in 1997′s Kickboxing Academy. In an odd choice of casting, the film’s producers cast her brother, Christopher Khayman Lee, as her love interest. Not only is he her love interest – they also have a few kissing scenes. EW! And just in case you were wondering, YES they really are brother and sister. I confirmed it on IMDB, here.

This video gives me the hee-be-jee-bees.

See for yourself!