Thehow to apply prosthetics with spirit gum Kardashian-Jenner crew continues to grow!

Burt Jenner

announced on Thursday that his girlfriend

Valerie Pitalo

is expecting the couple’s first child, a son.

“I promised to wait until we had the ‘all healthy’ update, and we got it yesterday… My lil boy, just chillin… So happy I can’t see straight, he can’t get here fast enough,” Jenner, 37, captioned an

Instagram photo

of an ultrasound.

Burt Jenner expecting

Source: Instagram

Pitalo posted

the same photo

to her own

Instagram account

, writing, “Oh boy!” with a series of Christmas and hatching egg emojis.

Jenner is the son of

Caitlyn Jenner

and ex-wife

Chrystie Scott

, who were married from 1972 to 1981. He has been

passionately supportive

of

Caitlyn’s recent transition

.

“I’m very excited. Part of me was screaming to say, ‘Hey, I’ve known for 25 years and I’ve always been supportive!’ I always will be,” Jenner

told

Esquire

in October

. “I’ve always tried to be an outspoken supporter of the LGBT community.”

— Andrea Park

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