United Kingdom, March 17 -- Paul Rudd and Nick Jonas have shared their thoughts on what makes the perfect wedding song while promoting their new musical comedy Power Ballad.

The actor, 56, and singer Nick, 33, spoke about their musical tastes during an interview with Entertainment Weekly at the premiere of their film Power Ballad at the SXSW Conference and Festivals, as their movie stars the pair as musicians whose lives intersect through the world of wedding entertainment and pop stardom.

During the conversation, both actors were asked to name what they considered to be "the ultimate wedding song".

Paul said: "I don't know, I kind of like to go against the wedding grain."

But he added: "I think, like, a great wedding song would be, y...