<Li> Drew Barrymore as Lucy Whitmore, Henry's love interest with short - term memory loss </Li> <Li> Rob Schneider as Ula, Henry's marijuana - smoking, native Hawaiian assistant and best friend; he is unhappily married to an overweight native woman and has five young, athletically talented children </Li> <Li> Sean Astin as Doug Whitmore, Lucy's older brother, a lisping, steroid - dependent bodybuilder </Li> <Li> Blake Clark as Marlin Whitmore, Lucy's widowed father, a professional fisherman </Li>

Who plays the brother in fifty first dates