Filming is already underway for the Love Actually mini sequel!

ET reported on Wednesday that Richard Curtis, director of the 2003 romantic comedy and co-founder of U.K. charity Comic Relief, was getting the beloved cast back together and filming a short sequel for the fundraiser's Red Nose Day on March 24. And it seems the production team isn't wasting any time, as they started filming the 10-minute movie just one day after the exciting news was announced.

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Liam Neeson was spotted on the London-based set on Thursday, reprising his role as widowed father Daniel with Thomas Brodie-Sangster, now 26, who played his onscreen son, Sam.

Nearly 14 years after the film's release, Brodie-Sangster has clearly grown up (check out that stache!) while Neeson appears as if he hasn't aged a bit.

British broadcaster Emma Freud, who announced the cast was reuniting via Twitter, also shared some behind-the-scenes production pics. "So this just happened. #rednosedayactually day 1 of filming," she tweeted. "Might have cried a tiny bit."

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Another candid shot featured Neeson and Thomas Brodie-Sangster flashing smiles on set.

In addition to Neeson and Brodie-Sangster, the project will also bring back Colin Firth, Hugh Grant, Rowan Atkinson, Martine McCutcheon, Keira Knightley, Andrew Lincoln, Lucia Moniz, Chiwetel Ejiofor, Bill Nighy, Marcus Brigstocke and Olivia Olson.

"I would never have dreamt of writing a sequel to Love Actually, but I thought it might be fun to do 10 minutes to see what everyone is now up to," Curtis explained in an article posted on the fundraiser's website. "Who has aged best? I guess that's the big question… or is it so obviously Liam?"

"We've been delighted and grateful that so many of the cast are around and able to take part -- and it'll certainly be a nostalgic moment getting back together and recreating their characters 14 years later," he continued. "We hope to make something that'll be fun -- very much in the spirit of the original film and of Red Nose Day -- and which we hope will help bring lots of viewers and cash to the Red Nose Day shows."

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