Hilary Duff and son Luca attended the same class as Jack Osbourne and his daughter Pearl. Credit: J. Sharmaja/Uja/Steinberg/PacificCoastNews.com; FameFlynet

Cute couple alert! Hilary Duff's dapper little dude, Luca, 18 months, was spotted attending the same baby class as Jack Osbourne's darling girl, Pearl, 17 months, on Thursday, Sept 26 in West Hollywood!

The two kiddos were dressed in L.A-chic attire: Adorable Luca, who bears a strong resemblance to his NHL player dad Mike Comrie, wore a short-sleeved button-down with cuffed yellow jeans and red Converse high-tops, while little Pearl rocked a stylish gray and white striped ensemble, accessorized with a floral-themed pacifier.

Their parents didn't look too shabby, either! Duff looked sexy in a gray tank top and black leather pants, while Osbourne paired a light blue oxford shirt with a navy suit vest and dark jeans.

With their significant others in tow as well -- Comrie and Osbourne's wife, Lisa Stelly, also attended the class -- the event was like a triple date for the two couples and their children!

The meeting was likely not a coincidence. The stars are friends and just a few days ago, Duff and Stelly had a moms' day out, sans children, that included shopping and manicures.