Mike and Bob Bryan turned 42 on Wednesday and wanted to celebrate. The twins hosted a special Instagram Live with 20 of their closest pals popping in, all for a good cause. 

They were looking to raise $42,000 for the Inspiring Children Foundation, with a sign behind them that appeared flipped backwards for the Live session. To kick off the show, Mike Bryan shared that he already got the best birthday gift possible, his son Jake was born just days earlier. 

"Bob's got three of these, but I'm catching up," Mike said. "I'm down three sets to one."

The guests included Andy Murray, Steve Johnson, Tommy Haas, Gustavo Kuerten, Victoria Azarenka, Bethanie Mattek-Sands, Coco Gauff, Bruno Soares, Jack Sock, Mardy Fish, John Isner, Ryan Harrison, Reilly Opelka, Frances Tiafoe, Leander Paes and musicians James Valentine, James Slater, Brett Dennen, Redfoo and Jewel. 

A lot of topics were covered, but here are a few memorable tidbits:

1

Harrison, 27, joked about being on tour almost as long as the twins, having started at the age of 14. The Bryans turned pro after college, in 1998, and planned to retire after this year's US Open. They can't wait to "restart the car" once the tour returns, but aren't sure about playing into 2021. 

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2

Sock revealed his upcoming wedding details. He'll marry Lauren Little on Kiawah island outside of Charleston on Dec. 12, 2020. 

3

Opelka called in from a boat near Key Biscayne where he's been enjoying ceviche with his roommate Tommy Paul. He said the Davis Cup tie earlier this year was his, Paul and Taylor Fritz's career highlight, so far. 

4

World TeamTennis CEO Carlos Silva is hopeful that WTT will be the first pro tennis back, after being the last pro tennis event pre-shutdown (the WTT Celebrity All-Star Match was on March 1). 

5

Bob's wife Michelle is a diehard Jewel fan, and couldn't resist making a cameo when the singer showed up. Jewel had positive thoughts to share about not just surviving, but enjoying the quarantine.