A. J. Quartermaine is a fictional character from General Hospital, an American soap opera on the ABC network.

Thought to be Rick Webber’s son but wasn’t "SORASed" in 1991, revising his birth year to 1973.

The role has been most notably portrayed by the actors Sean Kanan from 1993 to 1997 and Billy Warlock from 1997 to 2003, with a brief return in 2005.

Kanan announced in March 2014 that he would once again be leaving the series, voicing his disappointment over the writing for the character.

The role was also portrayed by Jason Marsden (1986–1988), Christopher Nelson (1988), Justin Whalin (April 1988 – 1989).

Kanan received a nomination for the Soap Opera Digest Award for Best Newcomer for his portrayal of A.J.

Following Kanan's departure, actor Billy Warlock was hired for the role of A.J., and he made his debut on June 13, 1997.

In 2003, Warlock earned a pre-nomination for the Daytime Emmy Award for Outstanding Supporting Actor in a Drama Series for his portrayal of A.J.. Warlock departed from the series in December 2003, amongst rumors that he was fired after disputes with show executives; the network replied his exit was due to lack of storyline.

[6] On September 17, 2012, Kanan revealed in an interview with TV Guide's Michael Logan that he was put on contract with General Hospital, but his character was not being announced.

In early 1980, it is discovered that Alan Jr. has a heart condition and Rick comes back to Port Charles to perform the surgery.

Alan Jr. and Jason are seen again when Monica, running for assistant chief of staff, has a picture taken with them to improve her public image.

blames his troubled childhood while his grandmother, Lila (Anna Lee), promises to give A.J.

His drinking grows worse, and he eventually admits to being behind the wheel the night of the car accident with Jason.

Carly lies and claims Jason (Steve Burton) is Michael's father while she leaves town to deal with postpartum depression.

meets his son when Jason's girlfriend, Robin Scorpio (Kimberly McCullough), asks him to babysit Michael.

decides to patch things up with Carly to please his grandfather, Edward (John Ingle), who is adamant about keeping the Quartermaines together under one roof.

also bonds with his long lost sister, Skye Quartermaine (Robin Christopher) who also battled with alcoholism.

He teams up with Skye to frame Jason and Brenda Barrett (Vanessa Marcil) for the murder of Luis Alcazar (Ted King).

returns in February 2005 to reveal that he and Courtney are still legally married when she announces her engagement to Jasper Jacks (Ingo Rademacher).

resurfaces alive in October 2012, appearing at the Quartermaine Estate to console Monica after Jason's death.

was revived by Monica and Steven Webber, who then smuggled him out of the hospital to a rehab facility overseas, while everyone was led to think he had died.

; however, after Carly (Laura Wright) confesses the truth about her relationship with A.J., he begins to open up to the idea of hearing him out.

is arrested again but he is released on bail thanks to his lawyer, Diane Miller (Carolyn Hennesy) convincing the judge of Tracy's treachery.

He reconnects with his sister Skye and meets his niece Lila Rae Alcazar, when they return for Edward's funeral.

AJ battles for an extended period in 2013 for control of the Quartermaine business, ELQ, with Tracy Quartermaine after Jerry Jacks (Sebastian Roché) ordered Robin Scorpio-Drake to revive his henchman Franco and make him Jerry's look-alike to poison Pickle Lila and Pickle Eddie before the starting of The Chew.

After the reveal that Kiki Jerome (Kristen Alderson) is not a Quartermaine, Tracy reclaims the CEO position.

is accused of murdering Connie Falconeri (Kelly Sullivan) when he has a drunken night and the letters AJ is written in blood.

Julian is mistakenly found over A.J's body when police officers Anna Devane (Finola Hughes) and Nathan West (Ryan Paevey) arrive to Ava's apartment.

dies after begging Carly to stay and telling her Sonny shot him, not giving her enough time to get to a nurse.

His spirit haunts Sonny and is then ushered into heaven by Emily where he is greeted by his grandparents, Lila and Edward.