Ellis canned five of his 13 three-pointers in the final frame, during which he poured in 25 of his total points to help the the Bucks rally from 13-point deficit.
Ersan Ilyasova (20 points, 11 rebounds) and Brandon Jennings (15, 14 assists) each provided a double-double as Milwaukee halted a three-game losing streak.
The Magic got a combined 47 points from Arron Afflalo and Maurice Harkless but still fell for the fifth time in six games.
Nikola Vucevic supplied 20 points and 15 boards for Orlando.
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