Billie Lourd has posted a heartfelt throwback picture tribute to her late mother Carrie Fisher

Alongside a picture of a young Billie in the back of a car with her mum, she wrote on Instagram: "If my life weren't funny then it would just be true and that is unacceptable" - Finding the funny might take a while but I learned from the best and her voice will forever be in my head and in my heart (sic)"

It comes a week after the 24-year-old beauty was joined by close family and friends, including Carrie's brother Todd Fisher and Billie's reported boyfriend, Taylor Lautner, at a memorial service last Friday (06.01.17), where some of the Hollywood legend's ashes were buried alongside her mother, Debbie Reynolds, who died a day after her from a stroke, at Hollywood's Forest Lawn Memorial Park.

The day before the burial, Carrie and Debbie were remembered at a private memorial at Carrie's home in Los Angeles, where Meryl Streep performed the song 'Happy Days Are Here Again' by Ben Selvin and The Crooners.

Speaking about the ceremony, a friend close to the family said: "By the end everyone was singing.

"Billie wanted the people her mother loved to at her in that living room one last time.

"The only things missing were Carrie and Debbie."

The ceremony is believed to have been attended by over 150 guests, including Gwyneth Paltrow, Tracey Ullman, comedian Stephen Fry and Carrie's beloved dog Gary, who all dined on fried chicken, green vegetables and cornbread.

The close friend said the service brought back fond memories of days spent at the house with Carrie and her mother.

The source said: "Debbie would sit in the corner, and everyone there would come up and pay homage. Even the biggest stars were starstruck by her. Carrie would walk around barefoot with a can of Coca-Cola, making sure everyone was having a good time, saying the funniest things you've ever heard."