Matthew Morrison's Duet with Elton John

It was announced last year that they would be teaming up for a duet, and now Elton John and Matthew Morrison have released a teaser clip.

The music legend and the “Glee” star collaborated on a mash-up of Elton’s “Mona Lisa and Mad Hatters” and “Rocket Man.”

Back in January, John told Parade Magazine, “It’s really fantastic. He sings great on it.”

The song will be available on iTunes starting tomorrow (April 19).