Sienna Miller reveals why she doesn't want to be the 'biggest movie star in the world' and says she plans to work for 'the rest' of her life READ MORE: Sienna Miller reveals how she really feels about becoming a second time mum at age 42 By Kate Dennett For Daily Mail Australia Published: 02:07 BST, 8 September 2024 | Updated: 02:07 BST, 8 September 2024 e-mail View comments Sienna Miller has revealed why she doesn't want to be the 'biggest movie star in the world'. The American-British actress, 42, has worked in Hollywood for more than two decades and is best known for her big roles in Layer Cake, Alfie and Factory Girl. However, Sienna - who recently welcomed her second child - has admitted she has no desire to become the most famous actress ever as she gave a candid insight into her career ambitions.

Despite having a staggering estimated net worth of $18million, Sienna also said she has no plans to retire early and wants to work for the rest of her life. 'I don't have to be the biggest movie star in the world. I love that I get to keep working,' she told this week's issue of Stellar Magazine .

'I know I will work the rest of my life. I get to do a play, I've got a beautiful new baby. Yeah, [I'm] very happy.

' She said she has never felt more 'fulfilled' and that her career ambitions involve working with esteemed directors including Poor Things' Porgos Lanthimos and Martin Scorsese . Sienna is currently promoting her new movie - Kevin Costner's western epic, Horizon: An Amer.