Photo by Joselyn King Morgan Wojchowski, from left, Nathan Baron and Alexa Prather are cousins born on the same day who turn 18 today.

Today marks the 18th birthday of three cousins — now seniors at Wheeling Park High School — all born on the same St. Patrick’s Day. Morgan Wojchowski, Alexa Prather and Nathan Baron all share the same birth date — March 17, 1992 — and business classes at WPHS. But they say they’ll each have their own birthday cake when their family gathers for a joint birthday celebration this weekend. Baron believes he has the edge over his female cousins. ‘‘I’m the oldest,’’ he claimed. Wojchowksi is the daughter of Diane and John Wojchowski; Prather the daughter of Beth and Jody Prather; and Baron the son of Richard and Becky Baron. Wojchowski’s and Prather’s mothers are sisters who gave birth on the same day, as did their cousin, Becky Baron. Now 18 years later, all three cousins are about to graduate from WPHS and head to college. Wojchowksi works at her family’s car wash after school. She is planning to attend West Virginia Northern Community College in the fall and become a paralegal. ‘‘Someday I’d like to work at the U.S. Attorney’s Office,’’ she said. Prather enjoys playing tennis. She is set for classes at West Liberty University, where she will major in psychology. She hopes to become involved in counseling. Baron plays golf and lacrosse at WPHS. He intends to major in engineering at West Virginia University but hasn’t decided which engineering area he will emphasize in his studies.