The April 4 re-release of James Cameron‘s billion-dollar film Titanic in 3-D will get a day-and-date release in IMAX 3D in 79 domestic IMAX-equipped theatres in the US and 63 foreign markets, with plans to increase that international total to 70, IMAX announced today. The 20th Century Fox/Paramount Pictures production is being released in 3-D but non-IMAX theaters on April 4 as well. Originally released Dec. 19, 1997, Titanic has grossed $1.8 billion so far. The RMS Titanic sank April 15, 1912, on its maiden voyage.