Diane Keaton’s son Duke seen for the first time since her death

Diane Keaton’s devastated son Duke was spotted leaving her LA home just a day after the legendary actress passed away at the age of 79.

Here are the photos – the 25-year-old cut a lonely figure as he left the house and headed to his car on Sunday, clearly mourning the loss of Diane, who adopted him in 2001.

As you know, Diane passed away the day before and the Los Angeles Fire Department tells TMZ that they responded to her home at 8:08 a.m. Saturday, with an ambulance taking her to a local hospital.

Her cause of death is currently unclear.

Diane rose to fame in the 1970s with “The Godfather” franchise, winning a Best Actress Oscar for 1977’s “Annie Hall” and going on to star in a host of other iconic roles.