Lisa Marie Presley is pregnant with her third child, US magazine reports.

The 40-year-old star - the daughter of late music legend Elvis Presley - is due to give birth this fall.

It will be her first baby with husband of two years, music producer Michael Lockwood.

"The couple are incredibly overjoyed," the rep told a US.

Presley and Lockwood got married in January. Presley had her first two children in her first marriage to Danny Keough, whom she was married to for six years.

Presley then married Michael Jackson in 1994 for 21 months, and then Nicolas Cage for just three months in 2002.