An adjustable peach aligner cup assembly (20) is provided for use in an automatic peach aligning and pitting mechanism. An adjustable alignment ring has first and second movable segments, (51, 52). Segments (51, 52) are moved away from each other to align large peaches and are moved toward each other to align small peaches. An actuator (61, 62) causes the segments (51, 52) on a specific aligner cup assembly 20 to be adjusted on a peach-to-peach basis to align a specific peach.