Katy Perry and John Mayer are all set to walk up the aisle together, at least according to their friends who want and expect the pair to get engaged ASAP.

According to their mates, Mayer is expected to propose to Perry, who'll you remember split from Russell Brand in December 2011 after 14 months of marriage, in the near future with a source telling E! News: 'It's inevitable.' They also said that the couple are 'very serious' and added: 'Everyone wants them to get engaged. They are so perfect together.'

Katy recently gushed about her feelings for Mayer, whom she first started dating in June 2012 saying: 'I actually am dating my crush. I had a crush on him for a long time.'

She also insisted she loved being married even though she got a divorce saying: 'Of course. I really loved it. It was a new, fun, exciting journey. But I like how I am now, and I think all things happen for a reason.'

John also presented Perry with a heart-shaped ruby ring for Valentine's Day earlier this year but a source insisted at the time that they weren't ready to tie the knot, saying: 'It's a one-of-a-kind Daniel Gibbings ring featuring a 12 carat ruby high-dome cabochon heart shaped centre, accented by two teardrop faceted sapphires and rubies, set in 20-carat gold.' If that's just the V-Day gift we can't wait to see the engagement rock.