There wasn't an empty seat available when WrestleMania 41 kicked off on Saturday ... and while there was plenty of action in the ring, NFL superstar George Kittle wanted in on the fun, too -- taking advantage of his screen time by chugging an entire beer!!
There were a ton of notable celebs at Allegiant Stadium in Las Vegas for WM Saturday ... including the 49ers tight end, "Saturday Night Live" star Michael Che, O'Shea Jackson Jr., Lil Yachty and Jelly Roll.
O'SHEA JACKSON Jr., MICHAEL CHE, AND JELLY ROLL are in attendance!