Today, he has been ordered to pay what is believed to be the biggest ever drink-drive fine in Britain after he was caught more than double the legal limit in a vehicle crash.
When a TV reporter went to cover a celebrity's auto crash court case, she didn't expect to be covering a totally different one.
McPartlin's barrister, Liam Walker told the court before judge Barnes handed down her sentence: "Anthony McPartlin is sorry and is doing everything he can to ensure this never happens again".
The legal alcohol limit is 35mg per 100ml of breath meaning McPartlin was over twice the limit when he crashed his Mini into two cars in Richmond, south west London, leaving a four-year-old girl in hospital.
Ant pleaded guilty to drink driving, and was fined £86,000 and given a 20-month ban.
He spoke to confirm his name, date of birth, address and nationality before pleading guilty to a single charge of drink-driving.
Canadian alleged serial killer facing 8th murder charge
Detective Sergeant Hank Idsinga of the Toronto Police Service said Kanagaratnam was born in Sri Lanka but moved to Canada in 2010. Idsinga has previously said that investigators are examining 15 unsolved homicides that took place between 1975 and 1997.
The other driver said, also in a witness statement: "Myself and my family were in deep shock as we believed we could have died as a result of Mr McPartlin's reckless driving".
The court heard that Ant had 75mg of alcohol in 100 millilitres of breath - twice the legal limit, according to The Telegraph.
His ban can be reduced to 15 months if he completes a drink-drive re-education programme.
The prosecution said that Mr McPartlin had apologised to police for his actions and admitted that he has a problem with alcohol and "emotional issues". Higher standards are expected of me, I expect them of myself. "I let a lot of people down and for that I am truly sorry". And for that I am truly sorry. For that I'm truly sorry'. "I'd like to apologise to everybody involved in the crash and I'm just thankful no one was seriously hurt".
McPartlin and Donnelly are among the best-known presenters on British TV, fronting primetime entertainment formats for ITV such as "Saturday Night Takeaway", "Britain's Got Talent" and "I'm a Celebrity, Get Me Out of Here!"