The trio each won two awards a piece at Tuesday’s ceremony, which was held at London’s O2 Arena.
Coronation Street’s Katie McGlynn was awarded Best Serial Drama Performance her her portrayal of Sinead Tinker in her cervical cancer storyline, which ended in the character’s death last year.
Her former co-star Peter Ash also won Best Newcomer for his role as Paul Foreman.
Ant & Dec also won the award for Best Presenter for the 19th consecutive year, while I’m A Celebrity... Get Me Out Of Here!, which they host, won the Best Entertainment Show.
Elsewhere, there was a surprise win for Mrs Brown’s Boys in the Best Comedy category, where it beat the likes of Fleabag and Derry Girls.
Gavin & Stacey was also honoured with a special Impact Award, following the hugely successful Christmas special, which has since become the most watched non-sporting BBC show since current records started in 2002, with a whopping 18.5 million viewers.
Check out the full list of National Television Awards 2020 winners below...
Chernobyl – WINNER
Mrs Brown’s Boys – WINNER
Ant and Dec
Jesy Nelson: Odd One Out – WINNER
Paul O’ Grady: For The Love of Dogs
Gordon, Gino and Fred Road Trip
Line Of Duty
Peaky Blinders – WINNER
Call The Midwife
Cillian Murphy (Peaky Blinders) – WINNER
Idris Elba (Luther)
Jodie Comer (Killing Eve)
Suranne Jones (Gentleman Jack)
Michael Stevenson (Casualty)
David Walliams (Britain’s Got Talent) – WINNER
Simon Cowell (BGT/ X Factor)
Sir Tom Jones (The Voice UK)
will.i.am (The Voice UK/The Voice Kids)
RuPaul (RuPaul’s Drag Race UK)
Serial Drama Performance
Katie McGlynn (Sinead Tinker in Coronation Street) – WINNER
Danny Dyer (Mick Carter in EastEnders)
Danny Miller (Aaron Dingle in Emmerdale)
Gregory Finnegan (James Nightingale in Hollyoaks)
Strictly Come Dancing – WINNER
Britain’s Got Talent
Dancing On Ice
The Voice UK
The Great British Bake Off – WINNER
Imran Adams, Mitchell Deveraux, Hollyoaks
Jack Nolan, Will Noble, Casualty
Jurell Carter, Nate Robinson, Emmerdale
Max Bowden, Ben Mitchell, EastEnders
Peter Ash, Paul Foreman, Coronation Street – WINNER
The Bruce Forsyth Entertainment Award
I’m A Celebrity... Get Me Out Of Here! – WINNER
The Graham Norton Show
RuPaul’s Drag Race UK
Live Magazine Show
Good Morning Britain
This Morning – WINNER
Gavin & Stacey – WINNER
Michael Palin – WINNER