ITV News report by Nina Nannar
Comer, 26, who plays assassin Villanelle in the hit thriller, shook off her cold, screen alter-ego to turn on the “waterworks” on stage.
She beat co-star Sandra Oh – who plays the operative on a mission to catch her – to the gong.
“Thank you so much,” Comer said. “Sorry I’m the only one who’s turned on the waterworks.”
She dedicated the award to her grandmother, saying: “Nana Frances sadly passed away on the first week of filming.
“She never got to see Villanelle, the life and soul of everything.
“She’d say ‘you get it off me you know’. I want to say ‘Nana Frances, you were absolutely right all along’.”
Comer, who revealed she spent years as a child watching the Baftas in her bedroom, also paid tribute to the show’s creator Phoebe Waller-Bridge as well as Line Of Duty’s Stephen Graham, a fellow Liverpudlian.
“If I didn’t owe you a pint before I definitely do now,” she said.
“Thank you for the generosity you showed me all those years ago.”
Killing Eve won best drama series, beating another BBC hit, Bodyguard.
Waller-Bridge said: “I can’t speak it’s so unbelievably exciting”.
She added: “Thanks for everyone for taking risks. Jodie Comer almost swallowed a wasp in Tuscany.”
Killing Eve’s Fiona Shaw won best supporting actress, beating Billie Piper, Keeley Hawes and Monica Dolan.
The role was “probably the greatest pleasure in my life”, she said.
Comedy thriller Killing Eve went into the awards leading the nominations, but not without controversy.
Bafta’s rules say a programme must have premiered in the UK to be eligible, but the show first aired in the US on BBC America before coming to the UK.
Bafta said there was “significant creative contribution from key UK talent throughout the production” and “the television committee is the arbiter of all eligibility”.
Bodyguard had been its main opposition, but it had to make do with one gong – the only award voted for by viewers – Virgin Media’s must-see moment.
It claimed the prize for the death of Julia Montague (Keeley Hawes) in an explosion in the BBC One drama.
The moment when Eve (Oh) stabs Villanelle (Comer) in Killing Eve, the Doctor Who episode on Rosa Parks, Peter Kay’s Car Share, The finale, and Queer Eye were all up for the award.
Benedict Cumberbatch won the leading actor award for his role as Patrick Melrose in the Sky Atlantic drama of the same name.
The actor, who received his first Bafta nomination in 2005, told the audience: “Oh gosh, I think I’m going to fall over, I’m very used to being a bridesmaid not the bride.
“I’ll keep it short because everyone probably does need to go to the bathroom.
Backstage, he said: “I really thought Hugh Grant was going to win.”
On stage, Cumberbatch paid tribute to his wife, saying: “You’re my rock, I had to go pretty weird for this one and it was nice to come home and feel stable again.
“It’s all right, I’ve got one (an award) and I’m going to bring it home.”
Funnyman Steve Coogan presented the award for leading actress.
He quipped: “When I was asked to present the leading actress award I was delighted because of course women are quite fashionable at the moment…
“I realise this is the last award of the night so will keep this shorter than originally planned… scroll down autocue.
“Female empowerment, blah blah blah… humbled and privileged nah, nah nah. The Bafta goes to Jodie Comer.”
Piers Morgan’s hopes of a win were dashed by Cambridge Analytica Uncovered (Channel 4), which triumphed in the news coverage category.
A camera panned to the Good Morning Britain presenter looking unimpressed.
Good Morning Britain had two nominations, for On A Knife Edge and its Thomas Markle exclusive.
Programme-makers thanked the undercover reporter who exposed what Cambridge Analytica were up to.
“We couldn’t have done it without him – or her,” they said.
“Facebook are saying they are doing what they can to protect people’s data … we still await to see if that’s the case.”
I'm A Celebrity... Get Me Out Of Here! has scooped a Bafta for the most recent series featuring Holly Willoughby as co-host.
The show won best reality and constructed factual, beating Dragons' Den, Old People's Home For 4 Year Olds and The Real Full Monty: Ladies' Night.
Willoughby filled in for Ant McPartlin on the show when the presenter stepped away from his TV roles after being arrested for drink-driving.
McPartlin persuaded Willoughby to get on stage at the Royal Festival Hall.
Co-presenter Declan Donnelly said: "Thank you Holly for helping me out last year.
"You did a fantastic job standing in for Ant, who has reluctantly come up here tonight."
McPartlin jokingly waved as Donnelly added: "He's still part of the team as well."
"Thank you Bafta this is a wonderful surprise have a wonderful evening."
He quipped "if anyone is feeling a little faint or funny see (I'm A Celebrity medic) Bob afterwards", who was also on the stage.
Ben Whishaw won best supporting actor for A Very English Scandal.
The actor was unable to attend the ceremony, with the award collected on his behalf by director Stephen Frears.
The Royal Wedding: Prince Harry And Meghan Markle lost out in the live event category.
The Royal British Legion Festival Of Remembrance, also on BBC One, won the gong.
Huw Edwards, who presented the programme, paid tribute to the “true heroes who won the award, that generation of men and women”.
BBC Three’s Killed By My Debt won best single drama, beating Netflix show Bandersnatch – Black Mirror.
The drama was based on the true story of Jerome Rogers from south London, who took his own life at the age of 20 after accruing mounting debts sparked initially by traffic fines while working a zero-hours job.
Programme-makers criticised bailiffs, calling them “organised gangs extorting money from people who haven’t got it”.
Mr Rogers’s brother, speaking on stage, criticised the “gig economy in our nation” and the “unregulated bailiff industry” leading a “young man to take his own life before he reaches his own 21st birthday”.
He added: “If one more person sees it (the show) because of tonight, it’s amazing.”
The Bros documentary lost out to Suffragettes With Lucy Worsley for specialist factual programme.
Steve Pemberton won best male performance in a comedy programme for Inside No 9.
The actor thanked his family and his mother, who he said would be “screaming and dancing in the street”.
Here are the main winners:
- FellowshipJoan Bakewell
- Special AwardNicola Shindler
- Comedy Entertainment ProgrammeA League Of Their Own
- Current AffairsMyanmar's Killing Fields (Dispatches)
- Drama SeriesKilling Eve
- Entertainment PerformanceLee Mack - Would I Lie To You?
- Entertainment ProgrammeBritain's Got Talent
- Factual SeriesLouis Theroux's Altered States
- FeaturesWho Do You Think You Are?
- Female Performance In A Comedy ProgrammeJessica Hynes - There She Goes
- Leading ActorBenedict Cumberbatch - Patrick Melrose
- Leading ActressJodie Comer - Killing Eve
- Live EventThe Royal British Legion Festival Of Remembrance
- Male Performance In A Comedy ProgrammeSteve Pemberton - Inside No. 9
- Mini-SeriesPatrick Melrose
- News CoverageCambridge Analytica Uncovered
- Reality and Constructed FactualI'm A Celebrity... Get Me Out Of Here!
- Scripted ComedySally4ever
- Short Form ProgrammeMissed Call
- Single DocumentaryGun No 6
- Single DramaKilled By My Debt
- Soap and Continuing DramaEastEnders
- Specialist FactualSuffragettes With Lucy Worsley
- Sport2018 World Cup Quarter Final: England V Sweden
- Supporting ActorBen Whishaw - A Very English Scandal
- Supporting ActressFiona Shaw - Killing Eve
- Virgin Media's Must-See Moment (voted for by the public)Bodyguard - Julia Montague Assassinated