Summer Glau: Chuck's Newest Guest Star!

Summer Glau is the latest celeb to land a guest role on NBC’s Chuck!

The 29-year-old actress will play the show’s newest Greta, EW‘s Michael Ausiello reports.

Other Gretas to come this season include Old Spice Guy Isaiah Mustafa and Stacy Keibler!

FYI: Olivia Munn originated the role of Greta in the season premiere on Monday!

Next up for Summer is NBC’s The Cape, which will begin its midseason run on NBC this fall!