Spotted: Jenny Humphrey and Eric van der Woodson returning to the Upper East Side or more accurately, Taylor Momsen and Connor Paolo back on “Gossip Girl’s” set Tuesday, possibly to film scenes for the drama’s series finale.

Kelly Rutherford, who plays Eric’s mom and Jenny’s former stepmom, Lily, tweeted the above picture, saying, “My kids are grown up!!”

That’s pretty much all we have to go on, though the show has been filming the series finale for the past few days. Eric and Jenny both left Manhattan after Season 4. Jenny has been mentioned a few times this season; Rufus mocked her eye makeup in the season premiere and this week Dan said something about getting back at everyone for driving his sister away. Eric was mentioned as “being abroad.”

ICYMI: ‘Gossip Girl’ Recap: “High Infidelity”

Last week, “Arrow’s” Katie Cassidy was seen on set, reprising her role as Juliet Sharp. There’s been some speculation that a familiar face will turn out to be Gossip Girl. Juliet seemed like a good guess, but we can’t rule out Jenny or Eric. Who do you think will be revealed as the mysterious, troublemaking blogger? Are you happy “the kids” are returning? Let us know in the comments below!

“Gossip Girl” airs Mondays at 9:00 p.m. EST on The CW.