Avengers director Joss Whedon has been slammed for calling Ivanka Trump a Pekingese dog on Twitter.

Whedon, an outspoken critic of Donald Trump, posted a photo of Kushner, writing: 'Hey, keep your eyes on this f****** prize too. He's a Voldemort in training, & unlike the Pekingese he married under, can play the long game.'

Whedon, who is often lauded for creating strong female characters in shows like Buffy the Vampire Slayer, attracted the ire of even his own fans who were put off by his comparison.

Whedon, (pictured left and right with his wife Kai Cole), was slammed for calling Ivanka Trump a Pekingese dog on Twitter

Whedon, an outspoken critic of Donald Trump, posted this tweet on Tuesday, calling Trump's son-in-law 'Voldemort in training'

Whedon posted numerous tweets criticizing Trump in the run up to inauguration, with some comparing the new administration to the Nazi regime.

On Tuesday, Whedon also lashed out at Kushner, who was cleared by the Justice Department's Office of Legal Counsel to serve as a senior adviser to the president.

Whedon posted a photo of Trump's son-in-law standing behind the president in the Oval Office, and called him 'Voldemort in training'.

Twitter users were incensed that Whedon would compare Ivanka to a dog, and both Trump supporters and Whedon's own fans hit back at the director, calling him 'disgraceful'.

User @Jessica_Elle wrote: 'You calling the beautiful, elegant, smart @IvankaTrump is absolutely disgusting and wrong. You're only tough behind the comp!'

One of Whedon's fans, tweeting under the handle @Mississipigeek wrote: '@joss Kept hoping this wasn't true. As a fan it hurts that you would call any woman a dog just days after the #WomensMarch.'

In the run up to the inauguration, Whedon posted numerous tweets criticizing Trump. He compared the new administration to the Nazi regime and called the president a 'dictator'

Whedon also lashed out at Kushner (above with Ivanka), who was cleared by the Justice Department's Office of Legal Counsel to serve as a senior adviser to the president

Twitter users were incensed that Whedon would compare Ivanka to a dog, and both Trump supporters and Whedon's own fans hit back at the director, calling him 'disgraceful'

Jennifer Sadler wrote: '@acecastiron @joss I've been a fan since the 90s. Thought better of you JossWhedon #notmyserenity #heartbroken #disgraceful'

Amidst the uproar, others stepped in to suggest that Whedon was comparing Donald Trump to a Pekingese - not his daughter Ivanka.

Corey D Willis seemed to think the Pekingese referred to Melania, and tweeted: 'You need to check your attitude Joss. I probably hate Trump as much as you, but comparing his wife to a dog makes you gross too.'

Others called Whedon 'ugly' and lashed out at his wife Kai Cole's appearance in response.

Nicholas Murray turned the attention back to the new president and expressed his empathy for animals, writing: 'Not that I agree with @Joss calling Trumps kid a dog ... but does anybody remember @realDonaldTrump calling @Rosie a pig ? The poor animals.'