Francis Ford Coppola, Clint Eastwood, Nathan Lane, Viola Davis, Josh Brolin, and Superman actress Valerie Perrine are among the stars mourning Gene Hackman.

The 95-year-old legend and his wife, Betsy Arakawa, 63, were found dead on Wednesday, alongside their dog, in their Santa Fe, N.M., home. The Santa Fe County Sheriff’s Office initially said foul play is not suspected, and there's an "active and ongoing investigation" into their deaths. In a search warrant affidavit released Thursday, authorities said their deaths are "suspicious enough in nature to require a thorough search and investigation," and that there were "no obvious signs of a gas leak."

Tributes poured in for the beloved actor after the news broke early Thursday. Hackman won two Oscars -- Best Actor for 1971's The French Connection and Best Supporting Actor for 1992's Unforgiven -- and had three other nominations for Bonnie & Clyde (1967), I Never Sang for My Father...