Luke Skywalker bids farewell to Carrie Fisher, his beloved 'space-twin'

There has been an outpouring of poignant tributes for Carrie Fisher, but none more touching than that of her intergalactic twin.

Mark Hamill, who played Princess' Leia twin brother Luke Skywalker, farewelled Fisher in a Facebook post after the writer and actress died aged 60 in Los Angeles Tuesday.

"It's never easy to lose such a vital, irreplaceable member of the family, but this is downright heartbreaking," he wrote.

"She was OUR Princess, damn it, and the actress who played her blurred into one gorgeous, fiercely independent & ferociously funny, take-charge woman who took our collective breath away."

Paying tribute to her toughness but also her vulnerability, Hamill said his life "would have been far emptier without her."

Hamill remembered the laughter he'd shared with Fisher, and that's surely how she'd want to be remembered.

Rebellious and quipping to the end, she knew how to go: "Drowned in moonlight, strangled by my own bra."