Shia LaBeouf went from big screen leading man to full-fledged global superstar playing Sam Witwicky - the unlikely hero of Michael Bay's blockbuster "Transformer" trilogy.
However, the 25-year-old star says that although he "loves making" the sci-fi movies, his days of fighting Decepticons are over for good.
"I just don't think there's anything [left] to contribute - there's nowhere to take Sam," stated Shia at the "Transformers: Dark of the Moon" premiere in Moscow on Thursday, when asked if he would be on board for a possible fourth installment. "I think creatively we've taken it as far as we can, and to do another one is purely a profit motive.
"I've given it my all and I'm proud of these three movies - I'm most proud of this third movie," he continued. "I feel like it's really hard to top this!"
In addition to his leading role in the robot action movies, Shia also starred in 2010's "Wall Street: Money Never Sleeps" alongside Michael Douglas, who was battling throat cancer at the time of the film's release - and Shia revealed that he has maintained contact with his former co-star.
"He feels strong," says Shia when asked how Michael's health is faring. "He's running again. He's back on the treadmill."
Catch Shia, along with Josh Duhamel and "Transformers" newcomers Patrick Dempsey and Rosie Huntington-Whiteley, in "Transformers: Dark of the Moon" - in theaters on June 29.
Catherine Zeta-Jones, who earlier this year had to deal with Bipolar II disorder, didn't admit her struggle to her spouse, Michael Douglas who was suffering with throat cancer, but is now getting better.
Michael said: "She's doing fine. She's been back working on her movie in Louisiana and she's feeling great. Catherine's a very strong woman and she's had a lot to deal with. She was so supportive and caring of me that she couldn't tell me or anyone else she was having a tough time herself. She's not the type of person to complain she's depressed when her husband is fighting cancer."
Michael underwent chemotherapy and radiotherapy in a bid to beat cancer and says he was pleased with how well Dylan, 10, and eight-year-old Carys - his children with Catherine - coped with his treatment, thinking the equipment it required was "cool" and similar to that seen in the Star Wars movie series.
He told Britain's OK! magazine: "They saw me getting radiation treatment and they thought it was like Star Wars. They thought it was the coolest thing they've ever seen with all the machines and the masks they put on your face. So in that way, I think you take the fear out of it. To be honest, kids are pretty resilient."
