Seventh Child on the Way for Kevin Costner

Seventh Child on the Way for Kevin Costner
Kevin and Christine Costner
Bryan Bedder/Getty

03/17/2010 AT 01:35 PM EDT

Kevin Costner is adding to his ever-expanding brood – a seventh child is on the way.

The actor, 55, and wife Christine Baumgartner Costner "are expecting in June," rep Arnold Robinson confirms to PEOPLE.

The new arrival will join older brothers Hayes Logan, 13 months, and Cayden Wyatt, 2 ½ – his sons with Christine – as well as Liam, 13, Joe, 22, Lily, 23, and Annie, 25, his children from previous relationships.

Reporting by JULIE JORDAN

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