EXCLUSIVE The unstoppable return of Sienna Miller: How star is 'ready to be Britain's biggest Hollywood star' at 42 - 20 years after first breakthrough roles in Layer Cake and Alfie and just five months after giving birth By Martin Robinson, Chief Reporter Published: 10:12 EDT, 20 May 2024 | Updated: 10:30 EDT, 20 May 2024 e-mail 19 View comments Sienna Miller has, at times, been more famous for who she dated than her work as an actress. But just five months after having a baby, the 42-year-old stole the show on the red carpet in Cannes last night as she promoted her new movie - Kevin Costner 's western epic, Horizon: An American Saga. Her co-star Costner summed her up yesterday by saying: 'Her outward beauty is undeniable, but she's so skilled as an actress.
' Embracing being a mother again in her early forties , Sienna is undergoing a renaissance with fans and commentators declaring that the British actress has 'never looked better' despite the demands of work and having a young family. Brand and Culture Expert Nick Ede told MailOnline that he predicts that Sienna could be about to 'steal the crown to become the UKs biggest Hollywood star'. He said: 'Sienna’s been looking after herself and got herself red carpet ready knowing this is going to be her big return to the big screen and knowing all eyes will be on her.
She’s done everything right and she commands The Croisette' - the beating heart of Cannes. Sienna's breakthrough roles came 20 years ago in Layer Cake and Alfi.
