Sienna Miller Parties Hard with Her Houseguest

The pint-sized British actress can often be found these days, stumbling into walls and being led around by friends after a long night of bar-hopping. Those close to her fear that her partying has reached a new level, due to the influence of her friend and current houseguest, Rhys Ifans. Friends of Sienna's believe that Miller is attempting to keep up with the wild Ifans, and that she's running herself ragged. It also doesn't help that Sienna is currently feeling as if co-star, Keira Knightley, who appears to be eclipsing Sienna in their upcoming film together, "The Edge of Love," which Keira's mother wrote with her daughter in mind.

"They are good friends but she feels Keira's star is rising while she is not getting the same glory and not being offered the same high-profile parts.

"She has been going out on the town a lot as a result but it is beginning to take its toll, particularly as she feels she has to keep up with Rhys, who is a notorious party animal."

That's the way to get an Oscar, sweetie. It worked for Tara Reid. Oh wait, it didn't. It's a horrible idea. I take that back.

(WENN)

More photos of the drunken pair are after the jump.