There's no hiding this baby bump any longer!

Parenthood star Erika Christensen, who's expecting a little girl, proudly showed off her pregnancy curves on Instagram.

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In a post to celebrate Earth Day, the slightly sunburned 33-year-old posed in a monokini that put her belly on full display while she stood barefoot atop a mountain.

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#everydayisearthday #kokohead

A post shared by Erika Christensen (@erikachristensen) on

This will be the first child for the actress and her cyclist husband, Cole Maness. The couple announced her pregnancy earlier this month on Twitter after just six months of marriage.

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Congrats to the beautiful mom-to-be!