Il participe à un grand nombre de pièces de théâtre lors de l'école secondaire.Il a obtenu son premier emploi dans un club de vidéo local. Il a trois demi-frères et sœurs plus jeunes, par le biais du deuxième mariage de son père : Jessica, Jake et Joe.Son père est d'origine irlandaise (péninsule de Dingle) et allemande, sa mère est d'origine suédoise et norvégienne À la suite de cette expérience, il se découvre une passion pour le cinéma et décide de poursuivre cette voie.From 2014 to 2016, he starred as Ethan Chandler in the horror TV series Penny Dreadful, for which he was nominated for a Fangoria Chainsaw Award.
Although the series was cancelled after sixteen episodes, Hartnett had made a name for himself. He performed in small plays and on national television commercials before being cast in his first feature film, playing the son of Jamie Lee Curtis' character in Halloween H20: 20 Years Later."They're whom I'm attracted to because I share experiences with them and understand a bit about what they are and what they do.If I were able to go back in time, I don't know if I could have done anything any different."He also appeared to have babies on the brain at the time.Oscars afterparty where the actress showed off her baby bump in a stylish black dress.Related: Josh Hartnett Turned Down THREE Major Superhero Roles!"I think if you spend too much time courting people's attention into your personal life, you lose your ownership of it. But when you work with somebody every day, it's like trial dating.You develop a fantasy about them."But earlier this year, he expressed a more positive view about it, in an interview with ."Everybody makes mistakes dating people they work with," he said.Casually cool: For their trip out to the shops the former teen heartthrob looked laid back but still stylish, wearing a pair of dark blue jeans, a black T-shirt under an open denim shirt and a pair of leather lace up shoes, which he wore without socks Clearly after dating for two years Josh's fashion sense have worn off on the 25-year-old as she dressed similarly, wearing distressed denim shorts with a black T-shirt and a pair of black lace up shoes.Couple's dressing: Clearly after dating for two years Josh's fashion sense have worn off on the 25-year-old as she dressed similarly, wearing distressed denim shorts with a black T-shirt and a pair of black lace up shoes The pair has been dating for two years and Josh recently revealed the key to making a relationship work in Hollywood - never keep girlfriends in the dark, especially when you have a history of dating co-stars. He first came to attention in 1997 for his role as Michael Fitzgerald in the television crime drama series Cracker.He made his feature film debut in 1998 in the slasher film Halloween H20: 20 Years Later, followed by teen roles in films such as the sci-fi horror film The Faculty (1998) and the drama The Virgin Suicides (1999).En 2001, c'est en endossant l'uniforme de l'armée américaine qu'il est révélé au grand public pour son rôle aux côtés de Ben Affleck et Kate Beckinsale dans Pearl Harbor (2001) de Michael Bay, puis grâce à La Chute du faucon noir (fin 2001) de Ridley Scott où il côtoie notamment Eric Bana, Jason Isaacs, Tom Sizemore, Ewan Mc Gregor et Tom Hardy.En 2002, il a joué dans Othello 2003, d'après la pièce de théâtre de William Shakespeare, il y incarne le rôle d'Iago.Hartnett and Egerton sparked romance rumors in 2012 and stepped out as a couple a year later. I saw what it could do to people pretty quickly." co-star Scarlett Johansson, talked about getting romantically involved with fellow cast members."I don't recommend it to young actors," he said.