Debbie Reynolds' Son on Her Death: 'I Watched Her Leave and Go to Carrie'

When enduring star Debbie Reynolds passed away on December 28, just one day after the tragic death of her daughter, "Star Wars" icon Carrie Fisher, many of their fans speculated that she had died of grief.

In a "20/20" episode that aired Friday night, Debbie's son Todd Fisher dispelled that notion, telling Elizabeth Vargas, "She didn't die of a broken heart. She just left to be with Carrie."

People magazine reports Fisher said his famous mom was not "sitting around inconsolable, not at all. She simply said that she didn't get to see Carrie come back from London."

After promoting her new book "The Princess Diarist," Carrie Fisher suffered a massive heart attack at the end of a long flight back to L.A. on December 23. She died at UCLA Medical Center on December 27 without ever having regained consciousness.

Todd told "20/20" that in her final minutes, Debbie said "how much she loved my sister. She then said that she really wanted to be with Carrie — in those precise words — and within 15 minutes from that conversation she faded out, and within 30 minutes, she technically was gone.”

When death came, Todd said it was very gentle. "She closed her eyes, peacefully, like you're going to sleep, and she literally went to sleep and left... I watched her leave and go to Carrie."

Admitting their survivors — including "Scream Queens" star Billie Lourd, Carrie's daughter — are "broken-hearted" by the one-two punch of losing both women, Todd sees the poetry in their passing. "It's horrible, it's beautiful, it's magical — they're together. It's beyond words. It's beyond understanding.”

Todd confirmed the women will be buried in a joint service "among friends" like Bette Davis and Liberace at Forest Lawn Memorial Park in L.A.

Watch Todd's interview with "20/20":