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Meet Vivienne Margaret MacArthur!

Legends star Ali Larter introduced her newborn daughter via Instagram Monday. “Beautiful day with my beautiful girl. #happymonday,” the proud mama, 38, captioned the black and white image.

This marks our second glimpse of the beautiful baby girl, who was born to the Heroes alum and her her writer-comedian husband Hayes MacArthur, 37, on Jan. 15.

The actress announced Vivienne’s birth on her website, alongside her first public photo.

“We couldn’t be more excited to share news of the arrival of Vivienne Margaret MacArthur,” she wrote. “She came bearing gifts for her brother: Batman sheets and lots of gummy bears!!! 7.5 lbs. of love.”

Vivienne joins the couple’s first child, son Theodore, 4.

Beautiful day with my beautiful girl. #happymonday

A photo posted by Ali Larter (@therealalil) on Feb 9, 2015 at 12:40pm PST