Billie Lourd is thankful for her ''supportive'' friends following the deaths of her mother Carrie Fisher and grandmother Debbie Reynolds.

The 'Scream Queens' actress shared a picture of her pals, including rumoured boyfriend Taylor Lautner, in onesies on Instagram along with a shoutout thanking them for their support following the passing of the 'Star Wars: The Force Awakens' star - who sadly passed away in December after suffering a heart attack on a flight from London to Los Angeles - and Debbie, who died a day after Carrie from a stroke.

Alongside the photo, she wrote: ''This group of onesie clad supremely supportive humans (and many others #notpicturedbutinthepicture) are the kings and queens of my world #greatefulfortheirgreatness #friendsfindingthefunny (sic)''

It comes weeks after the 24-year-old beauty posted a heartfelt throwback picture tribute to her late mother.

Billie shared a quote by the Hollywood legend and said that she will keep her mother's voice ''forever'' in her head and heart as she taught her so much.

Alongside a picture of a young Billie in the back of a car with her mum, she wrote on the photo-sharing app: ''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)''

her post came a week after Billie was joined by close family and friends, including Carrie's brother Todd Fisher and Billie's reported boyfriend at a memorial service on January 6, where some of the Carrie's ashes were buried alongside her mother's 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.''