"ABCD2 trailer attached to Avengers2 on the 24th. My first 3D trailer," Varun posted on Twitter.
The trailer seems to be a birthday gift for the "Badlapur" star, who will turn 28 on the same date.
"ABCD 2", helmed by choreographer-director Remo D'Souza, also stars Shraddha Kapoor. The dance film is a follow-up to "ABCD: Any Body Can Dance" (2013).
Starring Robert Downey Jr, Scarlett Johansson, Chris Evans, Chris Hemsworth, Mark Ruffalo, and Samuel Jackson, "Avengers: Age of Ultron" is the sequel to 2012 hit movie "The Avengers".