Caitlyn Jenner Celebrates Grandson Behr on His 5th Birthday: 'One of My Favorite of the 23'

Caitlyn's son Burt Jenner shares Behr with girlfriend Valerie Pitalo

Caitlyn Jenner is celebrating a special day for one of her grandkids.

On Sunday, the former Olympian, 74, shared an adorable picture of one of her grandsons on Instagram in celebration of his fifth birthday. Posting a picture of grandson William "Behr" as he sports a full face of clown makeup, the proud grandmother shared a sweet caption in honor of her grandson's big day.

"Happy birthday to one of the many grandkids - dare I say one of my favorite of the 23?! Happy 5th Behr! Love you!" she wrote.

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Related: Caitlyn Jenner Says She's Met Daughter Kylie's Baby Boy: 'Everybody's Doing Good'

Caitlyn has 23 grandkids from her six children and four step-children. Her son Burt is dad to son Bodhi, 6, Behr, and Goldie, 22 months, with girlfriend Valerie Pitalo. Her daughter Cassandra shares her three kids — Francesca, Isabella and Luke - with husband Michael Marino.

Son Brandon Jenner is dad to daughter Eva, 8, whom he shares with ex Leah Felder, and twins Sam and Bo, 3, with wife Cayley Stoker. Stepdaughter Kourtney Kardashian is mom to sons Mason, 14, and Reign, 9, as well as daughter Penelope, 11, with ex Scott Disick. She is also mom to son Rocky, 3 months, whom she shares with husband Travis Barker.

Stepdaughter Kim Kardashian is mom to daughters North, 10, and Chicago, 6, as well as sons Saint, 8, and Psalm, 4, whom she shares with ex Kanye West. Stepdaughter Khloé Kardashian is mom to daughter True, 5, and son Tatum, 18 months, whom she shares with ex Tristan Thompson. Stepson Rob Kardashian is dad to daughter Dream, 7, whom he shares with ex Blac Chyna.

Daughter Kylie Jenner shares daughter Stormi, 6, and son Aire, 2, with ex Travis Scott, while son Brody Jenner shares daughter Honey Raye, 6 months, with girlfriend Tia Blanco.

In February 2022, Caitlyn appeared on Good Morning Britain where she chatted about Kylie's son Aire, sharing that she had met the newborn and the makeup mogul and her baby boy were both doing "great."

"The family is growing! Kylie had her little boy, it was announced the other day. I have to be very quiet. I have to be very sensitive and be very careful when I talk about the family, but they're great," said Caitlyn at the time. "Kylie's doing great, everybody's doing good."

Speaking of her many grandkids, Caitlyn teased that she has trouble keeping "all the birthdays right."

"It's all on a computer," she added.

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