Lindsay Lohan over the moon on 37th birthday as baby on the way

Lindsay Lohan is celebrating not only her 37th birthday but her expected baby too.

The Mean Girls actor shared a selfie with her over 13 million followers on her birthday.

"Thank you so much for all of the wonderful Birthday Wishes! feeling blessed!" the 37-year-old captioned the post.

Lohan sported a white T-shirt, and teasingly kept her baby bump out of the selfie.

The Freaky Friday star also shared congratulatory wishes from friends and families, such as Christian Siriano and her younger sister, Aliana.

Previously, Us Weekly reported that Lohan and her husband, Bader Shammas, are set to have a son.

A bird chirped to the outlet that the baby's surname was set in stone.

"Lindsay is traditional and it's even more exciting because she now has an even greater bond with her husband because their son will carry his last name," the insider revealed.

Earlier, Lohan told Allure about her excitement about motherhood.

"Happy tears." She added, "That's just who I am. Though now, it's probably baby emotion."

She continued, "It's overwhelming. In a good way."