Dianna Agron Returns to Glee --- and Which Other Grad Is Following in Her Footsteps?

She's baaack!

She may have been missing from the Season 4 poster, but Dianna Agron is definitely returning to Glee.

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Co-creator and executive producer Ryan Murphy first tweeted a picture of Agron with her former TV frenemy Santana (Naya Rivera) late last week on what appeared to be their old choir-room stomping grounds. "Why am I so obsessed and proud about the Quinn/Santana friendship? It's my new favorite thing," Murphy tweeted. "Spin off?"

On Monday, many of the show's cast members, including Rivera and Agron's ex-TV-boyfriend Chord Overstreet took to Twitter to share their own pictures with the returning star. Overstreet also shared a picture with another McKinley High graduate, Harry Shum Jr.  aka Mike Chang, on Monday which seems to indicate Quinn's return will be populated with at least one other former New Direction members.

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What do you think will bring Quinn back to Lima? Which other former classmates do you want to see return to Glee? Sound off in the comments below!

Glee returns with new episodes on Thursday, Nov. 8 at 9/8c on Fox.