UNDATED (AP) – “Welcome! This is ‘Late Night with Jimmy Fallon … for now.” That’s how Fallon opened his show last night. It was his first since NBC made it official, that Fallon will be taking over for Jay Leno on the “Tonight Show” in about a year.

Leno opened the Tonight Show by saying it had been a tough day. Leno says he had to call David Letterman, to “tell him he didn’t get the ‘Tonight Show’ again.”

Letterman noted that he’s known Leno for 38 years. Letterman congratulated Leno “on a nice long run” on the Tonight Show. But Letterman adds, that is if Leno is “not coming back.”