Aleisha went to school along with her other siblings.She went to Sacred Heart School in the Bronx as a kid.

Since the age of four, she has been active in television and print as a model. At the age of six, she took on the recurring role of "Side Table Drawer" on the children's television series Blue's Clues (credited as LaNaé Allen). She was also a regular on Disney's television show Out of the Box. She has appeared alongside Jack Black in School of Rock (2003). Allen played "Alicia", one of the children in the class and a musician in the band. In 2005, she played "Lindsey" in Are We There Yet? starring Ice Cube and also in its 2007 sequel, Are We Done Yet?. In 2010, Allen guest starred in PBS remade show The Electric Company

Allen attended the Professional Performing Arts School in Manhattan, NY and is a theater major enrolled at Pace University. She is also a public speaker for events. She speaks at schools and recently The Father Daughter Dance , sponsored by Proud Poppa Magazine and Real Dads Network .