The Insider.com

This A-list heartthrob is celebrating his 37th birthday today -- the same day his new biopic J. Edgar opens in theaters. He began his Hollywood career at a young age and delivered compelling performances in numerous films including What's Eating Gilbert Grape, Titanic, The Departed, Revolutionary Road and Shutter Island. Here are five things you probably don't know about Leonardo DiCaprio.

• November 11, 2011Katie Holmes Wardrobe Malfunction
• November 11, 2011Lucy Hale 3rd Annual Kisses For The Troops
• November 10, 2011Good Karma: Meet John Legend and 50 Cent For Charity
• November 10, 2011Double Take! Celebrity Look-Alikes
• November 10, 2011Where Were They Then?
• November 10, 2011Say What ...?! Ashton Kutcher 'Will Stop Tweeting'

1. Was named after the famous artist Leonardo DaVinci after his mother felt Leonardo kick for the first time while looking at a DaVinci painting in a museum.

2. Made his film debut in the campy horror flick Critters 3.

3. Was offered the role of porn star Dirk Diggler in the 1997 film Boogie Nights around the same time as he was offered his role in Titanic. The role of Dirk Diggler was ultimately played by Mark Wahlberg.

4. As a child, suffered from Obsessive Compulsive Disorder and said he especially had the compulsion to avoid stepping on cracks.

5. Is an animal lover and his pets have included dogs, frogs and a bearded dragon lizard named Blizzard.