The 31-year-old actor, who will be seen in a double role in the Anees Bazmee-directed comedy, took to Twitter to share a bearded selfie.
"Black and white beard check!!! #London4Mubarakan!!!" Arjun captioned the image.
This is the first time the "2 States" actor will share screen space with actor uncle Anil Kapoor.
The movie also stars Athiya Shetty and Ileana D'Cruz and is scheduled to release on July 28.
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