Former couple will both be attending their friends' big day

Myleene Klass and her estranged husband Graham Quinn could come face to face at Marvin Humes and Rochelle Wiseman‘s wedding next month.

The former couple, who recently split just months after their marriage, are both refusing to give up their invites to the big day at Blenheim Palace in Oxford.

‘If they both end up going, they will have to avoid each other,’ says a source.

‘But it’ll be hard.’

Graham, 38, has tour-managed Marvin‘s band JLS for years and will be an usher, while Myleene is close friends with Saturdays singer Rochelle, 23.

Mum-of-2 Myleene has reportedly promised Rochelle she’ll be there to see her marry Marvin, 27.

‘She said she will stay strong and keep it together,’ the source tells The Sun.

‘Her upset has turned to anger.’

Graham denies he left Myleene on her 34th birthday and has ‘nothing but respect for her’.

SEE PICTURES Celebrity splits 2012>>

SEE PICTURES Myleene Klass celebrates 30th Birthday>>

NEW PICTURES Engaged celebrities>>

SEE PICTURES The JLS boys’ story in

SEE PICTURES Aston Merrygold – JLS in concert in Scotland>>

SEE PICTURES JLS star Aston Merrygold has lads’ night out in London>>

See Look‘s behind-the-scenes video of Aston Merrygold and JLS>>

SEE PICTURES Aston Merrygold – The JLS boys’ stories in

SEE PICTURES JLS star Aston Merrygold‘s night out>>

Esme Riley