Actress Liv Tyler poses at the 2008 MTV Movie Awards in Los Angeles June 1, 2008. [Agencies]

Liv Tyler's son wants to be a farmer. The 'Armageddon' actress, who has a three-year-old son Milo with estranged husband Royston Langdon, says her child dreams of ploughing fields and driving farm vehicles when he is older.

According to Liv, Milo even pretends he is a farm hand when they are at home. She said: "He's obsessed with cars and tractors.

During my days off I have to drive him around in this little golf cart, which he calls a tractor. It's really funny." Liv, 31, isn't the first Hollywood star to reveal their child's unusual career ambitions.

Last year, Reese Witherspoon admitted her four-year-old son Deacon had no interest in acting and is planning to deliver fast food when he grows up.

Reese said: "Deacon wants to be a pizza delivery boy. Not that there is anything wrong with that but it's hard to see how it could be a career as such. "

My eight-year-old daughter Ava wants to be a scientist but they are both at the stage where it changes from one week to the next. "Neither has said they want to be actors but you never know."