- Leo purchased a 104-acre island off the coast of Belize in 2005 to build a resort with renewable energy sources. The purchase price for the island, Blackadore Caye, was estimated to be $1.75 million.
- He loves movie posters.He want to buy a really expensive movie poster, the original for The Thief of Bagdad (1940).
- He is an environmental conservationist and often advocates and supports natural causes.In 2006, Leonardo produced and co-wrote his environmental documentary, The 11th Hour.
- In 1991, he made his film debut in the low-budget sci-fi horror film Critters 3.
- In 1993, DiCaprio played a supporting role to Johnny Depp in the movie What's Eating Gilbert Grape which earned him a nomination for the Academy Award for best supporting actor.
- Leonardo owns a fair-trade coffee company by the name of La Colombe Torrefaction.
- During the 2008 Presidential election, Leonardo gave $2,800 to Barack Obama's campaign which is the maximum amount an individual can give during an election.
- He was named for the other famous Leonardo: Leonardo DaVinci. Before he was born, the story goes, DiCaprio's mother felt her baby kick for the first time while she was standing in front of a portrait of Leonardo DaVinci at a gallery in Florence, Italy - according to Leo, his father took this as a cosmic sign.
- He has had obsessive-compulsive disorder since he was a child.
- He's a father! Well, technically. While filming Blood Diamonds in South Africa, he "adopted" a South African baby girl after meeting her at an orphanage. He sends her a monthly cheque and speak often on the phone.