Leonardo DiCaprio rode his bike along the Hudson River with his mom Irmelin Sunday in NYC. Yesterday his Titanic costar Gloria Stuart passed away at 100, and Leonardo released a sweet statement saying, "[she] was a force both on and off screen . . . She was one of the last great actresses from the Golden era of Hollywood. I was honored to have worked along side her. She will be missed." Leonardo has been hanging on both coasts since returning from an extended trip to Italy with Bar Refaeli where she showcased her famous bikini body and Leo had his own shirtless yachting moment. Leonardo is already looking at a busy 2011 when production starts on Hoover, directed by Clint Eastwood, and Inception is expected to be a big name come award season.