Damon Miller was a fictional character on the ABC's version of All My Children from October 30, 2009 to February 21, 2011. He was portrayed by Finn Wittrock. He is the son of Tad Martin and a Hillary Wilson-Milller.
Damon Miller arrived in Pine Valley as the biological father of Stuart Colby, who has been adopted by Liza Colby. Initially, Liza doesn't trust Damon, convinced that his renewed presence in the life of Bailey Wells, Stuart's biological mother, is only motivated by a desire to pursue a sexual relationship with her. Damon and Bailey eventually start to live life as family with Stuart until Damon is accused of being the culprit behind a rash of break-ins in town, for which Bailey is hesitant to believe his innocence. With the stress of Damon's alleged involvement in the break-ins too much for her to handle, Bailey leaves town to be with her parents. Damon begins to get close to Liza's daughter, Colby Chandler, who believes in his innocence and subsequently gets him a job as a bartender at ConFusion. Damon gets word from Bailey that she has returned to Ohio and she is staying with her parents. At the same time, the DNA test results confirm that Damon was the person doing the break ins but Liza gets him out of trouble again. Colby is furious when she learns of his lies, but the two eventually reconcile when her brother JR Chandler falls into a coma. He assures her that JR can hear her talking. He even gets tested to see if he is a potential bone marrow donor for him, but the results come back negative. Damon's boss later finds out that he was the one who broke in and fires him. Liza's boyfriend, Tad Martin then finds Damon sleeping on a stretcher at Pine Valley Hospital. Tad offers him a place to stay, at his house. Damon continues to show concern for Colby.
On March 11, 2010, when Damon goes to trial for his crimes, Liza learns that Damon's mother, Hillary Miller was supposed to come to town for the trial. But Hillary bails at the last minute leaving Liza wondering why. Liza finds out that Hillary Miller is actually Hillary Wilson, Tad's ex-girlfriend. On March 17, 2010, it is confirmed by a DNA test that Tad is Damon's biological father. Meanwhile, Damon's antics get his a lot of trouble. He takes Colby's car, this time with Colby inside and begins racing down the highway. He is texting Bailey at the same time and they crash into Brooke English. Her car is totaled but, luckily, she is saved by surgery. Meanwhile Damon needs surgery and Colby is right by his side. Liza overhears Damon telling Colby he wants to be more than just friends. So she persuades his probation officer that jail is exactly what Damon needs. But later, Damon is later diagnosed with ADHD and the instead of sending him to prison, he is sent to therapy. On April 28, 2010, Paul shows up in Pine Valley accusing Tad of harassing Hillary. Tad takes him to see Damon and they find him kissing Colby. Paul accuses Damon of seducing another girl and calls Colby a tramp before Tad makes him leave. Damon later overhears Liza confess to Colby that Damon is Tad's son. On May 4, Damon finally confronts Tad and he confirms that he is his father. In May 2010, Bailey calls Tad and informs him that Damon is not Stuart's father. On July 6, after he hugs Liza he kisses her.
In November 2010, throughout the murder trial for David Hayward, Damon assists Liza as she is appointed the District Attorney. On January 6, 2011, Damon spots Colby and Asher kissing. On January 7, 2011 Damon confronts both Colby and Asher. Later Damon confesses to Liza about what he saw and says he has to leave town. Just as he goes to leave Liza asks him not to leave and they hug before kissing and wind up having sex.