Ashlee Simpson and Evan Ross are reportedly organising a wedding ceremony at Evan's global superstar mother Diana Ross' mansion in California.

The 29-year-old singer and The Hunger Games actor are reported to be getting married at the start of September this year.

Evan has said his mother, Diana, has been helping him and Ashlee plan their upcoming wedding. He said, "She's involved in every part of our wedding and engagement party."

This latest news comes just months after Evan said he was so desperate to be married to Ashlee, he was even considering eloping.

This will be Ashlee's second marriage, she was previously married to Fall Out Boy star Pete Wentz.