Diana Ross will be performing at her son  wedding to Ashlee Simpson, and Stevie Wonder and Smokey Robinson could take to the stage as well! It's shaping up to be some party. 

Evan Ross and Ashlee Simpson are set to tie the know on August 31 and it's gearing up to be quite the celebrity event. 

Not only will Evan's mum, Motown legend Diana Ross, be singing a song or two for the happy couple, she has also invited Stevie Wonder and Smokey Robinson to the nuptials fuelling rumours of a one-of-a-kind performance.

According to E! Diana will also duet with her daughter Rhonda Ross Kendrick. And there's no doubt there will be a tune or two from the Simpson clan with both Ashlee and her sister Jessica well able to belt out a song.

The Hunger Games: Mockingjay actor Evan has previously revealed that The Supremes singer was very involved in planning his wedding.

He said: ''[My mother is] involved in every part of our wedding [and] engagement party.''

Evan also admitted that he can't wait to marry to Ashlee, who has a five-year-old son, Bronx, from her marriage to Fall Out Boy star Pete Wentz.
He said: ''Honestly, we could go and get married right now, wherever. We just want to be married. We're in love.''