It has been confirmed that Mad Men star Jon Hamm has parted ways with his partner Jennifer Westfeldt after 18 years together.

The couple broke the news via a statement which reads: "With great sadness, we have decided to separate, after 18 years of love and shared history.

"We will continue to be supportive of each other in every way possible way moving forward."

In March this year, a representative for Hamm confirmed that the actor had completed a stay in a rehab facility where he received treatment for alcohol abuse.

The couple started dating in 1997, but never got married.

Hamm rose to fame for his role as Don Draper in US drama Mad Men, which came to an end earlier this year after seven seasons.