How Chanel Iman, Kate Hudson, Drake and other stars celebrated Mother's Day

The Victoria's Secret model married NFL player Sterling Shepard in March.

Model Chanel Iman celebrated Mother's Day this year with a big announcement -- she has a baby on the way.

"Daddy and Mommy can’t wait to meet you," she captioned the black-and-white photo. "As I approach motherhood I want to wish a Happy Mother's Day to all mothers and mommies to be."

The couple, who tied the knot in March, also posed for a topless photo shoot to celebrate their expanding family.

"We both are blessed in many different ways, that our love has created a wonderful new life and can’t wait for this ultimate blessing to arrive," Iman captioned the pair of photos. "We thank God for allowing us this opportunity to become parents and can’t wait to hold our baby in our arms!"

Iman's baby news wasn't the only celebrity announcement Sunday. Pete Wentz also announced the birth of his second child, a baby girl, with his girlfriend, model Meagan Camper.

"So excited to introduce Marvel Jane Wentz," he wrote in a caption. "Feeling so grateful that she’s here... annnnd she’s already ready to takeover the world. Happy Mother’s Day @meagancamper and all the moms out there. We [heart] you."

Check out other ways Hollywood celebrated Mother's Day below.

The former lady first tweeted out a throwback photo of herself and brother Craig Robinson posing with their mother Marian Shields Robinson.

"It’s impossible for any picture to truly capture what my mother, Marian, has meant to me," she wrote.

The singer posted a loving tribute to his wife, model Chrissy Tiegen, who is expecting their second child.

Drake

The hip-hop star celebrated his mom Sandi Graham for the "nine months you carried me through."

The Oscar winner posted a throwback photo of her mother, actress Kate McCauley Hathaway, and praised her for pursuing her "dreams of being an actress while raising three children before that was cool and before you got credit for it."

Billie Lourd

For those having a "less than perfect Mother's Day," Billie Lourd, the daughter of the late actress Carrie Fisher, had a message for them.