The super-group - comprised of McFly's Harry Judd, Tom Fletcher, Danny Jones and Dougie Poynter, as well as Busted's Matt Willis and James Bourne - will join the 'Midnight Memories' hitmakers this summer for their 'Where We Are' world tour in Paris, France.
McBusted wrote on Twitter: ''AWESOME NEWS! We're @onedirection's special guest 21 Jun Paris Stade De France. Merci beaucoup (sic)
New dad Tom also wrote: ''YES we're @onedirection's special guests on 21 June Paris Stade De France. Gonna be très awesome! (sic)''
Niall Horan is close friends with the members of McFly and has recently been writing new music with the band.
Last year, the stars worked together on several tracks for One Direction's third studio album 'Midnight Memories', with one of the songs - 'Don't Forget Where You Belong' - featuring on the record.
McBusted aren't the only acts set to join One Direction - consisting of Niall, Harry Styles, Zayn Malik, Liam Payne and Louis Tomlinson - on tour as they will also be supported by Australian boy band 5 Seconds of Summer.
The 'Where We Are' stadium tour begins in Bogota, Colombia, on April 25 and ends in Miami, Florida, in October.
The Guardians return two months after their epic battle against Ronan with their criminal records erased