HOLLYWOOD, Calif. — The Girls Next Door are celebrating the arrival of Kendra Wilkinson and Hank Baskett's newborn son.

"Little Hank is here," Bridget Marquardt tweeted from Cabo after the birth of Hank Randall IV on Friday. "9lbs 5oz...WOW! Congrats to Kendra and Hank!"

Also marveling at the weight of the football star in the making was fellow co-star Holly Madison.

"Congrats!!! a 9 pounder!" she said on her Twitter page.

The man who hosted the couple's June wedding also got into the action on Twitter.

"Congratulations to Kendra & Hank on the arrival of little Hank," wrote Hugh Hefner. "What a wonderful Christmas present."