Seamus Davey-Fitzpatrick was born on December 29th, 1998 in New York. His father James Fitzpatrick is an actor and model, his mother Marty Davey is an actress. Seamus grew up in New York. The family moved to East Stroudsburg, Pennsylvania, in 2001 after looking for an area with a small-town feel.

Seamus' first acting job came about when his mother, Marty Davey, had decided to leave acting and started to pursue her M.S. degree in nutrition. Seamus was about a month old when Marty got a call from an "extra" casting director asking if she was still pregnant. When they realized she had delivered, they asked if they could use the one month old Seamus to portray a "crack baby." And thus began his illustrious acting career. It turned out to be a director's promo for a series that never got off the ground and has not been seen since. Seamus was held by an actor on the rise, Mark Ruffalo, in a heart wrenching scene where Mr. Ruffalo was trying to decide if he was cut out for his detective job trying to save babies just like the character Seamus was playing.

For the next couple of years Seamus' parents free lanced Seamus around several NYC's agents they had come to know, and through which Seamus booked some catalogue print work, and a couple commercials. James and Marty chauferred Seamus around to his auditions depending on which one was available. But it wasn't until he was shooting a spot for Marriott Hotels that his dad figured he might have a future in the acting biz.

Seamus was working with Jack Larson, who played Jimmy Olsen in the old "Superman" series, and the commercial actually told a nice story; it wasn't just about mugging and making faces. It was about a son helping his dad pack for a trip. "They'd do take after take, and I began to see Seamus fiddling with his props, and trying his lines a little differently each time. There was a thought process going on. I thought, "He gets it.' He was inventing a character. He was really paying attention.

Through James Fitzpatrick's fifteen years as a successful commercial actor and other agents, his parents got to know more specific to kids Seamus began to develop a reputation as not only another pretty face but as an young actor with the ability to focus on his role. Naturally his Dad introduced his son to his exclusive agent, Abrams Artists Agency, one of the top five agencies in NYC. It wasn't long before Abrams decided to sign Seamus exclusively. Abrams signed Seamus "across the board", commercials, voice overs, TV, film, theatre, etc. Seamus signed his first exclusive contract on July 1, 2003 at the ripe old age of four and a half.

He made his first appearance on the big screen in the 2006 remake of the movie The Omen, where he starred beside Julia Stiles, Liev Schreiber and Mia Farrow in the role of "Damien Thorn". For a callback for The Omen Seamus went to Prague, where the movie was filmed later, for a screen test. He had to swing slowly on a creaky swing. When the director called his name Seamus looked right into the lens of the camera. The director was so impressed by the scene that he used it as a teaser trailer for the movie. To his mother, Marty, that stare is familiar. She told that that is the look he gives her when she tells him to brush his teeth or do his chores. For Seamus himself the stare was one of harder tasks of shooting the movie, because he always had to stare at the camera without blinking.
Seamus knew right away he'd be playing the devil's son in The Omen. His parents gave him the information when he got the call for the original audition. At first he seemed slightly concerned, but his parents told him it's much more fun to play the bad guy. The good guy has to do all that kissy face stuff!!! That convinced Seamus right away.

When Seamus got a recurring part on CBS' daytime drama Guiding Light James and Marty decided to start homeschooling Seamus. This gives them more freedom for filming schedules and auditions. Seamus had just finished his regular stint on Guiding Light when he, in March 2008, landed the role of Young Robert Goodee in Everybody's Fine, a remake of a 1990 Giuseppe Tornatore movie. The comedy film starred Robert De Niro, Drew Barrymore and Kate Beckinsale. Seamus played the younger version of Sam Rockwell's character.

Acting is "a fun thing for me," says Seamus. "It's like baseball is for most kids I love going to the set. I love getting advice from experienced actors. And I love meeting new people."

During winter of 2010 Seamus appeared on the third season of Damages, the acclaimed legal series starring Glenn Close. Seamus played Kevin Tobin, the son of Campbell Scott and the grandson of Lily Tomlin's characters. He was featured in several episodes. After Damages Seamus booked the part of Dylan Leary in FX's new series Lights Out starring Holt McCallany, Stacy Keach and Catherine McCormack. Seamus had a recurring role as the nephew of the title character. Unfortunately the series got cancelled after it's first season.

Seamus can currently be seen in the commercial for the ADHD drug company Intuniv. It shows Seamus and his on screen Mother roaming through a hedge maze looking for the answer to the ADHD problem. The commercial has been running on National TV since Summer 2011. Seamus can also be seen in Charter Communications new commercials as Timothy.
Also look out for Seamus in Wes Anderson's new film Moonrise Kingdom. Seamus plays Roosevelt, one of the Khaki Scouts, in the coming of age film starring Bruce Willis, Edward Norton, Bill Murray, Tilda Swinton and Harvey Keitel. Moonrise Kingdom opens the '2012 Cannes Film Festival' and comes to theatres on May 25th.

As for his dream role, the young actor longs to star in a superhero movie. But, he notes, he doesn't want to play a world-saving crusader.

"I want to be the bad guy," says Seamus. "I just love evil people. They've got all the money. They've got the golden palaces. The hero has to go save the day. But the villain gets to have all the fun."

Parts of this biography uses extracts from an interview with The Morning Call.