Allen, a three-star forward, gave his verbal commitment to the UCLA Bruins, he confirmed to PurpleWildcats on Tuesday.
Once a Harvard commit, Allen received strong interest from Northwestern and Washington State in the fall. UCLA entered the mix just recently, extending an offer over a weekend visit.
"It's close to home, there's the [program] tradition, and it will be challenging," Allen explain of his choice.
Allen visited Evanston during the final weekend of October, where he was shown campus by NU players and coaches.