12/28/2011 07:08 pm ET

Debra Messing Dating Her 'Smash' Co-Star Will Chase, Report

Sparks have apparently been flying on the set of the new NBC musical series Smash!

A show insider confirms to PEOPLE that Debra Messing – who announced Dec. 20 that she was separating from her husband of 10 years, Daniel Zelman – is now dating her Smash costar, Will Chase.

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