Credit: David Livingston/Getty Images

Here comes the bride . . . in June!

Pregnant Drew Barrymore, 37, picked a summer date for her California vows to art consultant Will Kopelman, 34, "because she wants to get married before the baby comes, but doesn't want to be a huge," a pal tells the new issue of Us Weekly (out now).

Kids will still play a role in the ceremony, though. "She'll likely put his nieces and nephew in the wedding party," says a source.

After taking their romance public in February 2011, Us exclusively confirmed that Kopelman popped the question in Sun Valley, Idaho over the holidays, giving Barrymore with a radiant-cut Graff diamond just under 4 carats.

The Big Miracle actress and her beau recently returned from Paris, where she chose a Chanel wedding dress. (Kopelman's dad is the former head of the fashion house). "Drew met with his staff and had the first of many fittings," the pal says.

For more details on Barrymore and Kopelman's big day, pick up the new issue of Us Weekly, out now!