崔弟（Tweety）又译为翠儿，是《乐一通》动画系列里出现的一个小明星。他是一只黄色金丝雀，是男的。经常和傻大猫做冤家式的拍挡。

在传统的乐一通动画和《Sylvester and Tweety Mysteries》中，翠儿是非常聪明的。他在老婆婆面前的模样是可爱的，但对天敌就有一点儿残忍。这就使他避开了许多被吃的危险。而在最新版的乐一通动画《The Looney Tunes Show》里，在老婆婆的回忆中提及二次大战时他曾经帮助当时身为女特务的老婆婆阻止德军盗走罗浮宫的艺术品和艾菲尔铁塔，间接述明崔弟与她相识的经历。

Tweety (short for Tweety Bird or Tweety Pie) is an animated fictional yellow canary in the Warner Bros. Looney Tunes and Merrie Melodies series of animated cartoons. The name "Tweety" is a play on words, as it originally meant "sweetie", along with "tweet" being a typical English onomatopoeia for the sounds of birds. His characteristics are based on Red Skelton's famous "Mean Widdle Kid." Tweety appeared in 47 cartoons in the golden age.