London, Sept 16: It seems that actress Sienna Miller is increasingly getting sick and tired of her hectic filming schedule.

Apparently, the star seemed annoyed because her heavy filming schedule didn’t allow her to attend her former step mum Kelly Hoppen's book launch at Asprey jewellers.

"Sienna can't make it. She so sorry, but she can't get out of filming. She's working until 10pm," the Mirror quoted Sienna’s sister Savannah, as telling interior designer, Kelly.

However, once she'd finished her shoot, Sienna went out for a much-deserved drinks outing with her girlfriends.

"The girlies par tied the night away at the posh Groucho Club, giggling and drinking champers till 3am,” a source said.

"Sienna got so carried away, she jumped into the wrong car home and had to go back into the club to wait for the right car to turn up,” the source added. (With Inputs from ANI)