The 6-foot-8 power forward out of Memphis (Tenn.) Whitehaven chose the Bearcats over Auburn and Murray State.
"It's a great program," said Ellis. "All of their athletes graduate, and if they go to the NBA, they come back to get their education."
It could work out as a steal for the Bearcats as Ellis didn't get as much exposure during his junior season due to a torn calf muscle that caused him to miss half the season.
One of the main reasons for giving his verbal commitment to the Bearcats was he felt their up-tempo style fit his strengths.
"Octavious can play power forward and small forward," says William Rhodes, who is the coach for Memphis Select. "He is a skilled big man. He has a lot of post moves and is a natural athlete.
"He blocks shots up high and slaps them down," Rhodes adds. "He runs the floor well. He keeps the ball up high and he rebounds well."
Ellis also liked the campus, especially the close proximity of the classrooms and the athletic facilities.
With his decision out of the way, his primary focus can lie with his academic progress and senior basketball season.