(Mar. 5 10:30AM ET) -- It's hook-up time in Hollywood and TMZ has the hottest couples news.
'American Idol' host Ryan Seacrest has been linked with Playboy pin-up Lauren Michelle Hill.
But TMZ got this shot of Ryan with another blonde at The Ivy at the Shore in Santa Monica. An onlooker tells TMZ: "Ryan and the woman got into an argument inside the restaurant but they seemed to patch things up." The picture, however, doesn't look like all is hunky dory.
Meanwhile, John Cusack seems to be playing "cat and mouse" with both Lisa Bonet and Oscar winner Marisa Tomei.
This photo was also taken at The Ivy at the Shore. The mystery here -- exactly who is John with? The three walked out together, but onlookers say that inside the restaurant John and Lisa seemed pretty chummy, though John turned away from Bonet when he saw the photographers.
And it was "hook-up city" at the trendy Soho House LA this week during an ultra-exclusive pre-Oscars party.
Sienna Miller clearly wan't thinking about Jude Law as she clutched the hand of a mystery, olive-skinned hunk. Sienna was engaged to Law until she found out he was having an affair with his children's nanny.