The drama, which has been penned by David E Kelley, stars Adrianne Palicki as the famous superhero.
TV Line reports that Bruening has now joined the cast as Steve Trevor.
The character, who is a potential love interest for Wonder Woman's alter ego Diana, is a former member of the army who now works for the Justice department.
Bruening previously starred as Mike in NBC's reboot of Knight Rider. He has also appeared in shows including All My Children and One Life To Live.
Other stars cast in Wonder Woman include Cary Elwes, Liz Hurley, Pedro Pascal and Tracie Thoms.
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