Callum MacLachlan -- Kyle MacLachlan's New Son!

Desperate Housewives star Kyle MacLachlanand his wife, Project Runway executive producer Desiree Gruber, welcomed their first child on Friday, Us Weekly reports.

Callum Lyon MacLachlan weighed in at 8 lbs, 6 oz.

Kyle, 49, and Desiree, 39, have been married for six years.

Mr. MacLachlan is also set to have a part in the upcoming 2008 movie, The Sisterhood of the Traveling Pants 2 (Blake Lively, America Ferrera, Amber Tamblyn, Alexis Bledel).

Congrats to the happy couple!