María Magdalena Aicega Amicarelli (born November 1, 1973 in Buenos Aires) is a field hockey defender from Argentina, who won the silver medal with the Women's National Team at the 2000 Summer Olympics in Sydney, Australia. Nicknamed Magui, she first represented her native country at the Junior World Cup in 1993 inBarcelona, Spain, where Argentina won gold. The following year the penalty corner hitter played for the senior team, finishing second at the World Cup in Dublin, Ireland.
Aicega was awarded the Silver Olimpia, the most prestigious local prize awarded by Argentina's Sports Journalists Association, in 1998 and 2003. She was also nominated for the FIH's Best Player of the Year in 1999, won by Australia's Alyson Annan.