- This article is about the year. For the set, see 2003 Jumbo Building Bag.
- The LEGO minifigure celebrates its 25th Anniversary.
- This is the 71st anniversary of LEGO.
- LEGO introduces new, realistic skin tones for minifigures based on actual people and licensed characters. This affected the Star Wars, Harry Potter, Basketball, Ferrari and Spider-Man themes, but yellow skin tones are retained for all minifigures in non-licensed themes. For some other themes later such as The Lord of the Rings, The Hobbit, The Lone Ranger and Pirates of the Caribbean, these themes had continued using skin-toned minifigures.
- On September 13, the movie BIONICLE: Mask of Light is released.
- As of this year, 3.7 billion minifigures have been produced from LEGO.
Themes introduced or discontinued
- Clikits is introduced.
- LEGO Designer is introduced.
- LEGO Hockey, LEGO Basketball and LEGO Gravity Games are introduced.
- Orient Expedition, a sub-line of Adventurers, is introduced.
- Island Xtreme Stunts is discontinued.
- Discovery is introduced.
- Inventor is introduced, then discontinued.
- World City is introduced.
- Jack Stone is replaced by 4 Juniors.