Jude Law ended his relationship with Sienna Miller because he couldn't keep up with her partying lifestyle, according to reports. The pair split last week after reconciling earlier this year because Law wanted to spend quality time with his family while Miller wanted to go out on the town.

A source tells PageSix.com, "She was just too wild for him. 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 couple reunited again last May but are now reportedly over for good.

(This news article provided by World Entertainment News Network)