Rex Balsom is a fictional character from the American daytime drama One Life to Live, portrayed by John-Paul Lavoisier from May 9, 2002, to the show's finale on January 12, 2012.

With the character named "Jamie" prior to production, then-Executive Producer Gary Tomlin "toyed with the idea" of putting Rex in a gay storyline and Lavoisier stated in Soap Opera Digest in 2003: "I was asked by the higher powers at the show how I would feel about doing something like that.

It is ultimately revealed that Jessica and Natalie are actually fraternal twins and both the daughters of Victoria Lord Davidson.

Rex parlays his street smarts and shady connections into a sideline career as an amateur private investigator.

In 2006, Rex becomes romantically involved with Adriana Cramer, whose mother Dorian Lord disapproves of the match and goes to great lengths to keep them apart.

The search leads Rex to Paris, Texas, where he runs into Gigi Morasco, his high school girlfriend.

Agreeing with Rex that "it is a terrible thing for a father to not have the opportunity to watch his son grow up," Gigi says she has something to tell him.

Rex returns to Llanview and proposes to Adriana; she accepts, but Michael recognizes Marcie's ring.

Rex remains curious about his lineage, first asking Roxy, then his Aunt Corinne, about Walter Balsom's side of the family.

The truth eventually comes out, and though Rex is hurt and furious, Roxy evades his questions about his real father.

Allison Perkins switched Rex at birth with Roxy and Mitch's real son, Schuyler Joplin.

Roxy subsequently visits an unseen, comatose man in a hospital, whom she identifies as Rex's father.

Shane is diagnosed with leukemia, and Roxy discovers that Rex's comatose father is a bone marrow match.

Gigi's estranged sister, Stacy Morasco, blackmails Roxy into helping her pretend to be the donor.

Rex's Aunt Corinne gives him a copy of his birth certificate, revealing Mitch Laurence to be his father; Roxy confirms it.

Meanwhile, Gigi helps Stacy give birth to a baby girl she names Sierra Rose.

Stacy falls through the ice of a frozen lake and, despite Rex and Oliver's attempts to save her, she is presumed dead.

However, before they can marry, Gigi is left brain dead from carbon monoxide poisoning when she stumbled into a trap set by Jack Manning.

Rex also moves into the Buchanan Mansion, which he took ownership of as part of Clint's assets, along with Shane and Echo.

Natalie hires psychic, Madame Delphina, to help Rex contact Gigi's spirit.

Madame Delphina gives Rex a cryptic clue, which leads him to a strip club in Kentucky.

Professor Delbet Fina Jr. arrives at the diner to help Rex and "Stacy" with answers about the night of Gigi's death.

Rex comes back home to Llanview to surprise Shane with his mother, explaining to him that Stacy, not Gigi, was the one who had died.

In 2024, Charlie Mason from Soaps She Knows called Natalie and Rex "screwed-up individuals", which he blamed on Roxy's parenting.