Hackman was last spotted holding onto Betsy's arm while he used a cane on March 28, 2024, during a rare public appearance.
The couple were on a dinner date in Santa Fe, New Mexico, heading into Pappadeaux's restaurant.
The Hollywood legend had celebrated his 94th birthday just weeks before these pictures were taken.
The Hollywood icon made his final on screen appearance in 2004.
He told Reuters in 2008: "I haven't held a press conference to announce retirement, but yes, I'm not going to act any longer.
"I've been told not to say that over the last few years, in case some real wonderful part comes up, but I really don't want to do it any longer."
Although the pair were married for over thirty years, they had no kids together.
However, Arakawa is the stepmother to Hackman's three adult children from his first marriage to the late Faye Maltese.
He has a son named Christopher Allen and two daughters, Elizabeth Jean and Leslie Anne.
Betsy Arakawa was born on December 1, 1961, in Hawaii.
She was 31 years younger than her husband, born on January 30, 1930.
Like her husband, Arakawa was also involved in the arts.
She was a former professional classical pianist and the muse for his first solo fiction book, Payback at Morning Peak.
Hackman, born in California in 1930, was best known for playing Buck Barrow in Bonnie and Clyde.
He also starred as the agent in Mississippi Burning in 1998 and played Lex Luthor in Superman movies in the 1970s and 1980s.
Hackman also starred in the hit movies Runaway Jury, The French Connection, The Royal Tenenbaums, Unforgiven, and The Conservation.
In 1993, Hackman scooped the gong in the best supporting actor award category for his role in Unforgiven.
Cops have said there are no signs of foul play, per the Santa Fe New Mexican.
"All I can say is that we're in the middle of a preliminary death investigation, waiting on approval of a search warrant," Adan Mendoza, the Santa Fe County sheriff said.
Police have not revealed a cause of death.