Sienna Miller told her daughter a lie about ketchup

Los Angeles - Sienna Miller had to tell her daughter her blood spattered co-star Luke Evans was covered in ketchup during a shoot on High Rise.

The 33-year-old actress often takes her two-year-old tot Marlowe on set with her when she's working but the youngster sometimes has awkward questions for her mother about what's happening which means she has to be creative with her answers.

Sienna can remember a day on the set of the upcoming film which saw Luke require a fake head injury, but the quick-thinking star came up with a fun tale for Marlowe.

Speaking to the Metro newspaper, she said: "Marlowe knows her way around set and loves trailers. I do need (to tell) the odd lie."

Recalling Marlowe's curiosity about the artificial blood, she added: "I said, 'Look at all the ketchup on Luke's head,' when it was fake blood.

"It's quite hard to try and explain to your two-and-a-half-year-old what you do for a living."

Sienna has been enjoying a career renaissance with roles in Foxcatcher and American Sniper and has four films scheduled to come out this year, including High Rise.

The British blonde believes becoming a parent to Marlowe - her only child with fiancé Tom Sturridge - has helped her improve as an actress.

She said: "I think it (motherhood) gives you a depth. I feel like there's this person who is my priority and nothing else really is significant. That's the most important thing in my life, and as a result, I sort of relaxed about a lot of stuff."