Jimmy Fallon is bringing big guests to his new late night talk show. Justin Timberlake, Michelle Obama and Lady Gaga are already booked for the first week of The Tonight Show Starring Jimmy Fallon, among others.

The whole array of late night talk shows has just been a whirlwind of changes over the past two weeks. First, Jay Leno said goodbye to his talk show of 22 years. He handed the torch over to Fallon who will begin his time as the host for the show when it begins airing again on Feb. 17.

His previous show, Late Night With Jimmy Fallon ended on Feb. 7. Former Saturday Night Live cast member, Seth Myers will take over Late Night in the following weeks.

As all the hosts switch around, Fallon readies his new hosting duties and lines up guests for his “week of welcome.” On opening night, Yahoo! reported that Fallon will have will have Will Smith as the guest and U2 will perform.

He has also lined up for Jerry Seinfeld, Kristin Wiig, Bradley Cooper, Will Ferell and Michelle Obama to be guests. Lady Gaga, Arcade Fire and Tim McGraw will appear as musical guests. For it’s first four days on air, Tonight will air at midnight following The Olympics.

Watch The Tonight Show Starring Jimmy Fallon at 11:35 p.m. ET/PT on NBC.