Bristol Palin is single – again

The on-again, off-again engagement between Bristol Palin and Levi Johnston is off – again. The 19-year-old daughter of former Alaska governor Sarah Palin called off their wedding plans after her husband-to-be told her he may have fathered a baby with another woman.

Bristol Palin did not identify the woman when she gave a teary interview to People magazine to announce the break-up. A pregnant ex-girlfriend of Mr Johnston, 20, has publicly denied that he is the father. Ms Palin said he told her about the baby on 14 July, the day they announced their re-engagement. The couple have a toddler son together, Tripp.

Representatives for Ms Palin and Mr Johnston did not return requests for comment. But Mr Johnston's attorney, Rex Butler, told The Washington Post that he doubts the pair have permanently split up.

Ms Palin had said she didn't have her mother's full support over "reconnecting" with Mr Johnston. She said both her mother – the 2008 Republican vice presidential nominee – and her father, Todd, were worried that she would get hurt again.

She said the "final straw" was when Mr Johnston told her he was going to Hollywood to see a hunting show, but actually went there to star in a music video mocking her family. In the video being shot this month in Los Angeles, Mr Johnston will play a lover whose romance is thwarted by his girlfriend's mother.