Exclusive: Jon Stewart to host WWE SummerSlam

Jon Stewart's getting back in the ring.

In his first major gig since leaving The Daily Show Aug. 6 after a 16-year run, Stewart has signed on to be the host of WWE's SummerSlam on Sunday. The four-hour event airs live from Brooklyn's sold-out Barclays Center at 7 p.m. ET/4 PT on WWE Network.

A longtime pro-wrestling fan, Stewart engaged in a "feud" earlier this year with WWE heavyweight champion Seth Rollins — the TV host taunted Rollins online, the wrestler then crashed Stewart's show, and the twosome settled matters in the squared circle during an episode of USA's Monday Night Raw in March.

Sunday's SummerSlam is already a star-studded affair: In addition to an appearance from Stewart, a title-vs.-title clash between Rollins and U.S. champ John Cena, and a much-anticipated throwdown between Brock Lesnar and the Undertaker, Arrow star Stephen Amell is in a tag-team match with Adrian Neville vs. Stardust and Wade Barrett.