With everyone seated for dinner and glammed up for a grand celebration, Arg made a speech welcoming guests before ending with a toast dedicated to the beloved Nanny Pat.
Arg said: "I'd also like to do some remembering too, so please raise your glasses to one of Essex's finest. A lady who we miss dearly and who we'll always hold close to our hearts. To Nanny Pat, ladies and gentleman."
Nanny Pat was also remembered in the Power of TOWIE documentary, which was hosted by her grandson and original star of the show, Mark Wright.
The cast all spoke fondly of Nanny Pat - real name Patricia Brooker - who passed away in December.
It was an emotional tribute as a tearful Jessica Wright recalled the memories of her grandmother on the show, meanwhile Gemma Collins called her the "queen of the show", and James 'Lockie' Lock said Nanny Pat "commanded respect of everyone".
An upset Chloe Sims said: "I really can't imagine TOWIE without her, I feel really gutted for the whole family."
Jess added: "Thank you to TOWIE for giving her an amazing 80th. She had an amazing day and that was her last episode."
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