The Emmy-winning actor and his wife, Janet Holden, welcomed their first child earlier this month, it was confirmed Monday.
They are the proud parents of a new son, Finnigan Holden McCormack. He was born July 1 in Los Angeles, tipping the scales at 7 pounds, 2 ounces.
"Everyone's doing wonderfully," says an NBC publicist.
The Toronto-born McCormack, 39, won an Emmy last year for his role as the titular gay attorney opposite Debra Messing's Grace on the hit sitcom. He also recently moonlighted in the Broadway revival of Meredith Wilson's The Music Man.
McCormack and Holden, 36, met in 1995 during the filming of the TV series Lonesome Dove, in which he starred and she served as an assistant director. The two were married in 1997.
Will & Grace enters its fifth season on NBC this fall, with production resuming in the coming weeks. The sitcom, which finished last year as the 11th-ranked show on television, is slated to run at least three more seasons, after the cast signed a lucrative deal with the network earlier this year.