Taylor Swift is releasing an Ed Sheeran duet as her next UK single.

The singer is reportedly planning to release love ballad 'Everything Has Changed' as the fourth single from her multi-platinum selling album 'Red', which she co-wrote with her British pal.

The song is expected to storm the charts and be as successful as hit tunes 'We Are Never Ever Getting Back Together, 'I Knew You Were Trouble' and '22.'

The announcement comes after Taylor, 23, and Ed, 22, have been performing the fan-favourite song to rapturous applause during her 'Red' tour over the last two months.

The pair - who were forced to deny rumours they were dating - have been touring the US since March, and will resume their gigs in Detroit on May 4 after a short break.

Ed recently admitted the duo were likely to record more tracks together in the near future because they have formed a special bond over their love of songwriting and acoustic guitar.

He explained: "We're male and female, but we do exactly the same thing like we're both the same age, we both write songs with guitars we both tour playing acoustic music and that's kind of it.

"We've got a similar sense of humour. I guess we just have a lot in common."