Olivia Wilde and Jason Sudeikis get cozy at U.S. Open

The couple that plays together stays together!

Engaged duo Olivia Wilde and Jason Sudeikis packed on some playful PDA as they hit up the U.S. Open in Queens on Monday night.

Sports fans Wilde, 29, and Sudeikis, 37, looked "cozy" as they watched Serena Williams beat Francesca Schiavone in the first round, a spy dished to us. At one point, Wilde rumpled her beau's hair.

The lovey-dovey twosome "chatted quietly all night" and "held hands" as they made their way around the Emirates Suite, the witness added.

Cuba Gooding Jr. also found his love at the tennis tourney's opening night, albeit of the edible variation. The Oscar winner was spotted chowing down on a hot dog and a pretzel, which he swankily paired with a glass of Moët & Chandon Champagne inside the brand's suite.

A number of other celebs came out for the first day of the Open, too, including Kevin Spacey, Vogue's Anna Wintour (a good pal of tennis stud Roger Federer's) and Matt Bomer. Grammy winner Lenny Kravitz headlined the opening festivities.