August 25, 2010 03:00 PM

Michael Doven

Break out the blue balloons: It’s a boy!

Kelly Preston and John Travolta — who announced they were expecting this past May — are having a son, Preston’s rep confirms to PEOPLE.

On Aug. 8, the couple celebrated their happy news with some 40 close friends at a shower held at their Los Angeles-area home.

The intimate outdoor gathering, which featured a bird’s nest theme by Lady Liberty Catering & Event Planning and a three-layer cake from baker Dorie Kinney, “was a wonderful day,” says shower co-host Keisha Whitaker.

The joyful occasion marked continued healing for Preston, 47, and Travolta, 56, whose son Jett suffered a fatal seizure at age 16 in January 2009.

Says a family friend: “This baby is such a healing baby.” He will join big sister Ella Bleu, 10.

Michael Doven

For more details and exclusive photos of Preston’s shower, pick up this week’s issue of PEOPLE, on newsstands Friday.

— Michelle Tauber

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