Beast Boy (real name Garfield Logan) is a shape-shifting superhero in the DC Comics universe.

As a child, Gar came down with a rare illness called Sakutia and was cured by a serum from a green monkey. This serum had the unintended effect of turning his skin and hair green and gave him the ability to change into any animal (the colors and appearance of these animals changed depending on which artist was using the character at the time).

Originally and currently known as Beast Boy, he was adopted by Elasti-Girl and Mento, members of the Doom Patrol. He later joined the West Coast team of the Teen Titans (known as Titans West), and was part of the New Teen Titans assembled by Raven. It was at this time that he took the name Changeling. He remained with various incarnations of the team, forming a close friendship with Cyborg.

He later began using the name Beast Boy again, under which he got his own mini-series Beast Boy. Following a failed attempt to recreate "Titans West" as "Titans LA," he rejoined the main team.

He has also worked as an actor, playing the role of an alien in the TV series Space Trek 2022 (which, even in the fictional setting, was a thinly disguised pastiche of Star Trek and Space: 1999, and was cancelled following threats of legal action on the grounds of plagiarism).

Beast Boy appears in the Teen Titans animated series, voiced by Greg Cipes.

In the series, Beast Boy (nicknamed "BB", "Beasty Boo" and others) plays the role of the light-hearted jokester of the group, though often the butt of many jokes himself (similar to his comics self). He's also prone to causing much of the mischief around Titans Tower, such as the time he kept a mutant larva hidden in his bedroom, whom he named Silkie . In "Can I Keep Him?," the larva devours much of the Tower while the team is on a mission fighting Johnny Rancid. While trying to hide him from the others, Beast Boy entrusts Silkie to Starfire to hide, but she ends up adopting the creature.

Beast Boy also had a romantic relationship with a girl named Terra who had the ability to control earth and the elements in the earth. Terra kept secret that she couldn't control her powers and shared it with Beast Boy on the promise that he wouldn't tell anyone. Robin quickly found out, and she left in panic, believing that Beast Boy had broken his promise. She later returned after some "practice" and subsequently joined the Titans. She took Beast Boy on a date, although this was merely a cover to keep him safe from an attack on Titans Tower which she had engineered (she had grown extremely attached to him; this showed the most when they were about to kiss). However, during the date they were attacked by Slade who had Terra reveal her alliance with him. Devastated, Beast Boy broke up with Terra (not intentionally) and flew back to assist his friends to stop the fruits of Terra's treachery. Terra later returned to kill the Titans, though Beast Boy still believed that she could be saved and loved by him. His opinions changed, however, after she almost kills him. Beast Boy fought Terra in Slade's lair where he discovers that Terra wanted to leave (and rejoin him as a Titans member and be his lover again) but was being controlled by Slade (Slade was quick to point out, however, that Terra had willingly allowed him to gain control of her body). Terra was eventually able to overcome the control with Beast Boy's help and she sacrificed herself to save the city from a volcano triggered by her powers, becoming a statue. Before their last moments together, she told Beast Boy that he was the best friend she ever had.

Beast Boy is not without his dark side, however, as was proven in "The Beast Within." During a fight with Adonis, Beast Boy was soaked in chemicals that further destabilised his DNA so that he changed into a hulking, primal beast when under extreme stress. The demeaning relationship that he and Raven share came to a head, and it was believed that he attacked her, but it was later revealed to be Adonis that was the culprit. Although he was later treated for these chemicals, he commented that he could still feel the beast inside him. This is later proven when he is seen as the beast when defending Raven from Trigon's army.

• Beast Boy's description on the animated series