But after auditioning for his first acting role at age 9, Radcliffe found his talent and his career took off.
Howie Mandel, the host of the TV game show "Deal or No Deal," is coming clean about his obsessive-compulsive disorder or OCD in "Here's the Deal: Don't Touch Me," a revealing memoir due this month.
The stand-up comedian has a fear of dirt and germs and won't shake hands with anyone. He even keeps his head shaved because it helps him feel cleaner.
Mandel talked publicly for the first time about his condition -- he also suffers from attention deficit disorder -- on "The Howard Stern Show" in 2006.
Mandel joked that his condition even prevented him from cheating on his wife for 20 years, because he was too afraid to make any moves on the models who appear on "Deal."
Earlier this year, Mariska Hargitay suffered a mysterious lung collapse.
In January, the "Law and Order: SVU" star was hospitalized and underwent surgery for a partially collapsed lung. At the time, it was rumored Hargitay had been in a skiing accident, but Hargitay never revealed the cause of her condition.
Then, in March, the Emmy winner was again rushed to the hospital after she complained of breathing problems on the set.
"Mariska Hargitay went to the hospital this morning after experiencing some discomfort relating to her earlier lung condition," her rep told People magazine. "She is undergoing routine tests and expects to be feeling better soon. Production will not be affected."
In the August issue of Redbook, Hargitay finally opened up about her ailment. Last October, while shooting an episode of "SVU," Hargitay, who does her own stunts, jumped and landed in a way that a microscopic bleed began in her lung tissue.
"I got up and felt that something inside was not quite right," she said of the stunt that caused the injury. "At first, I thought I had the wind knocked out of me. I was angry with myself. Later, I thought maybe I'd pulled a muscle, but I didn't focus on the injury and kept expecting it to get better."
It didn't. Two weeks later, she was experiencing shortness of breath and chest pains. By January, her right lung had collapsed 50 percent. After surgery, she was told she had a 1 in 1,000 chance of it happening again. It did in March.
"I just thought, 'Please, make me better, please make me better,'" Hargitay said. "I got really scared that maybe something else was wrong. All those old fears about my mom and my grandfather [both of whom died relatively young] came shooting up."
Fully recovered since March, Hargitay, who has a 3-year-old son, told Redbook she has been feeling like "the luckiest person in the world."