Billie Lourd's Stepfather Offers His Heartfelt Support After Carrie Fisher and Debbie Reynolds' Deaths

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After Billie Lourd lost her mother, Carrie Fisher, and grandmother, Debbie Reynolds, within a span of two days, the actress' stepfather, Bruce Bozzi, reached out with a touching message of love and support.

Bruce, who is married to Billie's father, talent agent Bryan Lourd, took to Instagram on Thursday to share a photo of Carrie and Debbie standing alongside Bille during her college graduation. "It's an honor to be your Stepfather,” Bruce's tribute began.

"This day, your NYU grad day we had so much fun! Yankee Stadium your mom and I laughed our asses off, as she kept one fantastic line coming after the other," he wrote alongside the sweet throwback pic. "The strength of these women live so vibrantly in you. I've been lucky enough to see this for a decade! Many decades to come."

WATCH: Debbie Reynolds and Carrie Fisher's Powerful Bond: Looking Back At Their Sweetest Mother-Daughter Moments

Bruce went on to share, "Heaven just got a s**t load more fun!"

Debbie died on Wednesday at the age of 84 after suffering a stroke. Her death came one day after Carrie died at the age of 60, after she went into cardiac arrest on a flight from London to Los Angeles last week.

Carrie and her ex, Bryan, welcomed their daughter in July 1992. The couple's three-year-long relationship ended when Bryan left Carrie for Bruce, a restaurateur. Bryan and Bruce recently tied the knot in October. Billie served as a witness at the courthouse ceremony.

WATCH: Billie Lourd Delivers Amazing Impression of Debbie Reynolds Weeks Before Her Grandmother's Death

For more on the lives and legacy of Billie's mother and grandmother, watch the video below.