Actress Heidi Mueller is engaged to her longtime boyfriend, American football star Demarco Murray.

The Dallas Cowboys running back recently proposed to Mueller and the Passions soap star shared the exciting news with fans by posting a photo of the happy couple on her Instagram.com page on Monday (19Jan15).

Alongside the snap, in which she shows off her big diamond ring, she simply wrote, "We're Engaged!!!!!!"

The stars are parents to 18-month-old daughter Savanna June.

News of the engagement emerges weeks after the couple was rumoured to have split amid allegations of Murray's infidelity.

The sportsman hit headlines in December (14), when his former Oklahoma Sooners college teammate Brennan Clay accused his wife, Gina D'Agostini, of having an affair with him.

Clay later recanted his claims and apologised for blasting D'Agostini and Murray, insisting he "jumped to a conclusion that wasn't true".