British actress Sienna Miller has been dropped from Guy Ritchie's movie Sherlock Holmes after her ex-beau Jude Law was roped in to play Dr. Watson, the aide of the sleuth.

Sources close to Miller say the actress was delighted to have been approached about a role alongside Robert Downey Junior as Sherlock Holmes, but Ritchie dropped her after Law decided to be Watson.

Close friends say the 26-year-old is now "seriously worried" about her acting career as another film of hers, Nottingham, has been suspended until next year, reports dailymail.co.uk.

Sienna has been really down in the dumps about her love life and her career. Losing Sherlock Holmes has been another major setback for her. Sienna's not half as well off as people assume, said one of her friends.

The friend added: Money is becoming a bit of an issue and she has just signed a big modeling deal to pay the bills, even though she'd much rather be acting.

Meanwhile, Miller's relationship with her millionaire actor beau Balthazar Getty is going through a rocky patch because of his slow divorce proceedings with ex-wife Rosetta Millington.