It’s hard to believe that the series finale of Chuck aired over four years ago! No one could make us laugh quite like Zachary Levi in that show.

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Over the course of the show’s five seasons, plenty of celebrities guest starred in an episode. Scroll down to see 12 celebs you totally forgot were a part of the series.

Olivia Munn (Greta)

NBC

Stacy Keibler (Captain Victoria Dunwoody)

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Nicole Richie (Heather Chandler)

NBC

Rachel Bilson (Lou)

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Danny Pudi (Vali Chandrasekaren)

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Gary Cole (Jack Burton)

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Jenny McCarthy (Sylvia Arculin) and Andy Richter (Brad White)

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Matt Bomer (Bryce Larkin)

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Ben Savage (Mark Ratner)

NBC

Michael Strahan (Mitt)

NBC

Steve Austin (Hugo Panzer)