U2 will be among the guests when Jimmy Fallon makes his debut as the host of The Tonight Show on US television next month.

Variety reports that Will Smith will also be a guest on the February 17 show.

Fallon said he had been in regular contact with his predecessor, Jay Leno, who had advised him to make his monologue longer in his new role.

Commenting on what viewers can expect from his tenure, Fallon said: "It should be goofy and funny and make people laugh. That's our job. ...I wish [former hosts] Steve Allen and Johnny Carson were still around to see what we're going to do with the show."