Lindsay LohanLindsay Lohan is reportedly set to gain a new stepmum after dad Michael Lohan proposed to his girlfriend Erin Muller.

A source told OK magazine recently: “Michael recently proposed to his girlfriend Erin but they’re keeping it quiet for the moment.”

But not that quiet: according to the magazine, Erin was spotted flashing her new ring around at the Mercedez-Benz Bridgehampton Polo Tournament, New York and shouting “we’re engaged!”

Michael split from Lindsay’s mum Dina Lohan in 2005 when he was sent to jail for “aggravated unlicensed driving” and attempted assault. The couple’s divorce was finalised last year after a custody dispute over the couple’s four children.