Niki Taylor has given birth to another baby.
PHOTOS: Supermodel moms
The 36-year-old supermodel and her husband, former NASCAR driver Burney Lamar, 31, welcomed son Rex Harrison on Wednesday at 11:03 a.m., her rep confirms to Us Weekly.
PHOTOS: Pregnant supermodels!
The newborn weighed 7 lbs., 5 oz. and measured in at 19 inches long. He joins older sister Ciel, 2, and twin bothers Jake and Hunter, 16 (with Taylor's ex-husband Matt Martinez).
When Us caught up with Taylor at the "Celebrity Apprentice" finale in May, the '90s cover girl said her daughter was excited to no longer be the youngest in the family.
PHOTOS: What these stars love about motherhood
"I think Ciel's going to be fine," Taylor, who wed Lamar in La Jolla, Calif., in December 2006, told Us. "She's going to be a great big sis!"
RELATED ON WONDERWALL:
Niki Taylor talks about donating blood and almost dying in a car accident
From Hilary to Ashlee, Hollywood's youngest moms
Meet Tori Spelling's new daughter, Hattie Margaret
It's been 20 years since "Jurassic Park" came out. See what the cast of the movie is up to these days.
Check out Jessica Alba, Reese Witherspoon, and more stars who recycle their wardrobes.
From Benji Madden and Cameron Diaz to Mariah Carey and Nick Cannon, take a look at some of Hollywood's strangest couples.
Check out some of January Jones' most retro wardrobe choices from over the years.
See how Angelina Jolie's looks have changed over the years.
Find out what happened to the stars of 'Garden State' after they made the hit indie film.
Check out some of the cutest celeb baby bumps hitting the beach this summer.
© 2014 Microsoft