Updated November 6:
Greg's character on "90210" will be a yoga instructor who will interact with Lori Loughlin (Debbie) and Jennie Garth (Kelly).
Updated October 30:
Greg tweeted about his first day on the new “90210” and while he wants to wait to share more details about his character (indicating he’ll be on for a bit), he did say this:
“Second, 90210!! Great seeing old faces!...
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