Ryan Reynolds feuds with ‘seething demon’ Betty White in behind-the-scenes clip from The Proposal

Ryan Reynolds has carried on a playful feud with Hugh Jackman over the years.

But the Golden Globe nominee appears have to made an even worse nemesis out of another Hollywood icon.

He feuded with ‘seething demon’ Betty White in a hilarious behind-the-scenes clip from their 2009 movie The Proposal, which he posted Sunday to his Instagram Story, wishing the comedy legend a happy 99th birthday.

Hollywood feud: Ryan Reynolds feuded with ‘seething demon’ Betty White in a hilarious behind-the-scenes clip from their 2009 movie The Proposal, which he posted Sunday to his Instagram Story, wishing the comedy legend a happy 99th birthday

Paying tribute: The 44-year-old wrote: 'We made this 12 years ago. Betty turns 99 today. But she is [100 emoji] the funniest person on the planet'

Paying tribute: The 44-year-old wrote: ‘We made this 12 years ago. Betty turns 99 today. But she is [100 emoji] the funniest person on the planet’

The 44-year-old wrote: ‘We made this 12 years ago. Betty turns 99 today. But she is [100 emoji] the funniest person on the planet.’

He appears with co-star Sandra Bullock, 56, at the beginning of the clip, as they film a behind-the-scenes segment, which is interrupted by White. 

‘What is Betty doing here? She’s got an issue with me,’ he tells Bullock, who asked: ‘What is your problem with Betty? She’s like the nicest person on the planet.’

Bullock then returns to set, as White joins Reynolds, whose name she seems to have forgotten, before telling him: ‘Get me a cup of coffee.’

Leading lady: He appears with co-star Sandra Bullock, 56, at the beginning of the clip, as they film a behind-the-scenes segment, which is interrupted by White

Leading lady: He appears with co-star Sandra Bullock, 56, at the beginning of the clip, as they film a behind-the-scenes segment, which is interrupted by White

Nicest person: 'What is Betty doing here? She's got an issue with me,' he tells Bullock, who asked: 'What is your problem with Betty? She's like the nicest person on the planet'

Nicest person: ‘What is Betty doing here? She’s got an issue with me,’ he tells Bullock, who asked: ‘What is your problem with Betty? She’s like the nicest person on the planet’

What's his name? Bullock then returns to set, as White joins Reynolds, whose name she seems to have forgotten, before telling him: 'Get me a cup of coffee'

What’s his name? Bullock then returns to set, as White joins Reynolds, whose name she seems to have forgotten, before telling him: ‘Get me a cup of coffee’

Terrible assistant: 'We've been working together for weeks, months actually,' he tells her, to which she responds: 'And you've been a terrible assistant that whole time'

Terrible assistant: ‘We’ve been working together for weeks, months actually,’ he tells her, to which she responds: ‘And you’ve been a terrible assistant that whole time’

Dark side: Reynolds tries to jog her memory, but she interrupts: 'When Betty White says she wants a cup of coffee, you get her a f***ing cup of coffee! You ab-crunching jacka**'

Dark side: Reynolds tries to jog her memory, but she interrupts: ‘When Betty White says she wants a cup of coffee, you get her a f***ing cup of coffee! You ab-crunching jacka**’

Suck it! He reaches his boiling point, as he snaps: 'You seem like an adorable, sweet old lady on the outside, but on the inside, you're like this seething demon. You hear me? Why don't you suck a hot c***? That's right everybody, I told Betty White to go such a hot c***!'

Suck it! He reaches his boiling point, as he snaps: ‘You seem like an adorable, sweet old lady on the outside, but on the inside, you’re like this seething demon. You hear me? Why don’t you suck a hot c***? That’s right everybody, I told Betty White to go such a hot c***!’

The finger: Bullock returns, coming to White's rescue, who runs over to the Miss Congeniality star, while discreetly giving Reynolds the finger

The finger: Bullock returns, coming to White’s rescue, who runs over to the Miss Congeniality star, while discreetly giving Reynolds the finger

‘We’ve been working together for weeks, months actually,’ he tells her, to which she responds: ‘And you’ve been a terrible assistant that whole time.’

Reynolds tries to jog her memory, but she interrupts: ‘When Betty White says she wants a cup of coffee, you get her a f***ing cup of coffee! You ab-crunching jacka**.’

He reaches his boiling point, as he snaps: ‘You seem like an adorable, sweet old lady on the outside, but on the inside, you’re like this seething demon. You hear me? Why don’t you suck a hot c***? That’s right everybody, I told Betty White to go such a hot c***!’

Bullock returns, coming to White’s rescue, who runs over to the Miss Congeniality star, while discreetly giving Reynolds the finger.

White played Reynolds’ grandmother in the 2009 romantic comedy about a high-profile book editor (Bullock) who decides to marry her assistant (Reynolds) so she doesn’t get deported to Canada.

50 years later: The birthday girl took to Instagram with another throwback, as she celebrated the milestone with the re-release of her 1971 animal-friendly talk show The Pet Set

50 years later: The birthday girl took to Instagram with another throwback, as she celebrated the milestone with the re-release of her 1971 animal-friendly talk show The Pet Set

Feeding time: White fed a baby elephant with fellow comedienne Carol Burnett, 87, in one segment

Feeding time: White fed a baby elephant with fellow comedienne Carol Burnett, 87, in one segment

Man's best friend: In another clip, the late Burt Reynolds introduced her to his dog

Man’s best friend: In another clip, the late Burt Reynolds introduced her to his dog

The birthday girl took to Instagram with another throwback, as she celebrated the milestone with the re-release of her 1971 animal-friendly talk show The Pet Set.

She wrote: ‘Would you believe it?! It’s my 99th birthday which means I can stay up as late as I want without asking. I am also very pleased to let you know about the re-release of my long-lost series after fifty years! I am just so proud of the “Pet Set”. I hope everyone is well and staying safe. We will get through this.’

White fed a baby elephant with fellow comedienne Carol Burnett, 87, in one segment, before the late Burt Reynolds introduced her to his dog.

Other celebrity guests on the show included Mary Tyler Moore, Shirley Jones, Paul Lynde and Vincent Price.

The Golden Girls star has received an outpouring of love from friends and fans, as Melissa Joan Hart, Valerie Bertinelli, George Takei and more paid tribute to the legend on her milestone birthday.

Birthday girl: The Golden Girls star has received an outpouring of love from friends and fans for her 99th

Birthday girl: The Golden Girls star has received an outpouring of love from friends and fans for her 99th

Adored by many: Melissa Joan Hart, Valerie Bertinelli, George Takei and more paid tribute to the legend on her milestone birthday

Adored by many: Melissa Joan Hart, Valerie Bertinelli, George Takei and more paid tribute to the legend on her milestone birthday