Jennifer Aniston

The 'Friends' actress developed her fear of being underwater due to a childhood trauma.

She said in an interview with E! Online: "I was a kid and I was riding this tricycle around a swimming pool and I drove my tricycle into the swimming pool and I didn't let go and my brother tried to [help me]."

She added: “So, I can't go underwater and no one will believe me. I honestly can't."