Jeremy Renner stopped Elizabeth Olsen feeling ''overwhelmed'' on the 'Avengers' set.

The 27-year-old actress worked alongside the actor in the 'Avengers: Age of Ultron', in which she portrayed Wanda Maximoff and Scarlet Witch and he Clint Barton, and has admitted she would have been plagued with anxiety if he wasn't for his advice.

Speaking to Vulture, she said: ''My first day filming on '...Ultron', I was with Jeremy and we were ushering like 400 extras or something and I was really overwhelmed and Jeremy in a very simple way broke down a very human goal about why he's there, what he's doing and where his goal was and really simplified it for me.''

The pair have also worked together on 'Captain America: Civil War' and most recently 'Wind River' and it seems their friendship extends further than just co-stars.

The 46-year-old hunk - who was previously married to Sonni Pacheco for less than a year - set tongues wagging over the weekend when he planted a kiss on Elizabeth at the 2017 Sundance Film Festival on Sunday (22.01.17) in Park City, Utah, during an interview.

The talented duo were being grilled on their roles in 'Wind River', which sees the brunette beauty play Jane Banner and Jeremy portray Cory Lambert, when the actor thought it would be hilarious to undermine everything his beautiful co-star has said.

He then giggled, planted a friendly kiss on her cheek and told her: ''I love you.''

This isn't the first time the pair have been romantically linked as rumours started to swirl a few years back before she was said to be dating her co-star Tom Hiddleston.

However, after weeks of speculation, Elizabeth - who is the sister of twins Mary-Kate and Ashley Olsen - poured cold water on the rumours and stated they were friends.