American actor Bill Paxton has passed away at the age of 61. His shock death on Saturday was due to complications from heart surgery. The tragic news, on the eve of one of Hollywood's biggest nights (The Academy Awards), has come as a shock to many. Paxton had a long Hollywood career, starring in many iconic films such as Titanic, Twister, Apollo 13, Tombstone and Aliens. His most recent work was in TV shows Big Love, Agents of S.H.I.E.L.D. and Training Day.

Already, some of his former co-stars and colleagues are sharing their thoughts and prayers on social media. Read them below: