Niki Taylor

It's a boy -- again -- for Niki Taylor.

The model and her husband, former NASCAR driver Burney Lamar, welcomed a son on Wednesday, People reports.

Niki Taylor expecting baby No. 4

Rex Harrison was born at 11:03 a.m. and weighed 7 pounds, 5 ounces. No word on what inspired the name, but Rex Harrison is also the famed actor who played Prof. Henry Higgins in the big-screen adaptation of My Fair Lady.

Baby Rex joins sister Ciel, who's 2 1/2, and 16-year-old twin brothers Jake and Hunter, who are Taylor's children from a previous marriage.

Taylor wed Lamar in December 2006.

What do you think of the name Rex Harrison?