Ashton Kutcher has reportedly visited his estranged wife Demi Moore for a second time this week.

The 33-year-old apparently went to see her on Monday, the day after she was released from hospital, and now his car has been spotted arriving at her Los Angeles home again.

The Ghost actress, 49, was said to have been hospitalised after a violent reaction to nitrous oxide (laughing gas).

Last week, a spokeswoman for the star said: "Because of the stresses in her life right now, Demi has chosen to seek professional assistance to treat her exhaustion and improve her overall health.

"She looks forward to getting well and is grateful for the support of her family and friends."

Demi filed for divorce from Ashton in November last year after a San Diego woman said she had had a fling with the actor.