Jude Law and Sienna Miller Back Together?

Less than a week after announcing they'd split up over "fundamental differences", Jude Law and Sienna Miller have booked a Christmas holiday together reports NW Magazine. The on/off couple will jet off to Kenya for a luxury safari break. "Jude and Sienna feel they need to spend quality time together away from London," says a source. "Their relationship has been under so much pressure recently. They want to spend some time together without any attention from the outside world."

When the couple spilt last Sunday, a pal spilled to PEOPLE, "It's a mutual decision," a pal of the actor says. "They have definitely come to the end of the road. They tried to make it work but it failed."

PageSix reported it was Jude Law who called off his rocky relationship with Sienna Miller.

"She was just too wild for him," said an insider. "She partied too much. He is a devoted father of four children and she always wanted to go out constantly. He was just done with her."

Miller, 24, dumped Law, 33, the first time around, breaking off their engagement in the summer of 2005 when he confessed to having an affair with his children’s nanny, Daisy Wright.

The on-off couple reunited again last May.