Captain America star Chris Evans has sparked rumours his on/off romance with Minka Kelly is back on after spending time with the actress in recent weeks.

The action man initially dated Kelly in 2007 and they reunited in 2012, only to split once more last year (13).

However, it appears the couple is now back on after the brunette beauty was spotted with Evans at a family karaoke night in his hometown of Sudbury, Massachusetts in late September (14).

An onlooker tells People.com, "It looked like a family night out. They were with a bunch of people, including Chris's family, and Chris and Minka sat in the back while other people in their group got up and did some karaoke."

Evans also reportedly invited Kelly over for lunch at his Los Angeles home on Tuesday (21Oct14).

Kelly previously dated newly-retired baseball ace Derek Jeter from 2008 to 2011, while Evans romanced actress Jessica Biel from 2004 to 2006 and was linked to British beauty Alice Eve late last year (13).