The pair wed in an intimate ceremony over Sharon Osbourne's birthday weekend. Jack even tried to keep it secret by denying the wedding over Twitter.
"I love how going to Hawaii with my mum for her 60th has turned into my wedding. Hahaha people are funny," he tweeted.
Not too convincing, Jack.
The whole event was pretty low key, according to sources.
"Everyone just seemed really happy and excited about everything," a source said.
It's a happy ending for Jack and Lisa - the pair met last year and quickly found out they were expecting a child. He was understandably freaked out, he said.
"What do you say? If we'd been trying for two years, of course you'd be like 'Awesome!' But we met in May and found out in August," he told Hello! Magazine after daughter Pearl Clementine was born.
Let's hope these two have their happily ever after, though somehow we have our doubts.
Jack and Lisa are the only celeb couple to get hitched over the weekend, though!
David Cross and Amber Tamblyn
"Arrested Development' star David Cross, 48, married his longtime girlfriend, actress Amber Tamblyn, on Saturday. The pair married in true hipster fashion, according to a photo posted on Instagram by pal Lance Bangs.
"Yo La Tengo playing Superchunk, Mission of Burma, and Pixies covers at David and Amber's wedding," Bangs wrote, along with the photo of the pair dancing at the reception.
The pair started dating four years ago and got engaged in 2010, despite an 18-year age difference. Opposites attract, right? Not exactly: They have the same dry sense of humor, judging from Tamblyn's trolling of singer Tyrese last year. Basically, she played along when the singer emailed her to collaborate, thinking she was Wiz Khalifa's girlfriend Amber Rose.
"I've never met Tyrese before. He pulled my email addy from that cc list and emailed me wanting to work on an album together," Tamblyn wrote on her blog at the time. "So I recorded my demos on my iPhone and sent them to him. I guess you could call them Awareness Raps? I am the Hilary Clinton of Ghostface Killahs…"
Tyrese was less than impressed. However, she got +1 million points with snarky comedians everywhere for her master trolling.
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