PIC: Maria Shriver, Patrick Schwarzenegger Shop for School Supplies

Credit: Whosay.com

Back-to-school shopping can be exhausting!

Before he began his senior year, Patrick Schwarzenegger, 17, picked up some last-minute school supplies while shopping with his mother Maria Shriver.

"Back-to-school shopping. I'm [too] tired so [my mom] is pushing me around," Patrick tweeted Monday, adding a picture of Shriver carting him around inside Staples.

Patrick isn't the only Schwarzenegger family member who's prepping for a new school year. "Christopher is a big 8th grader -- his last year of middle school," Shriver, 55, tweeted Tuesday. "Cherish this time!"

The following day, Shriver -- who filed for divorce from actor and former California governor Arnold Schwarzenegger on July 1 -- told her Twitter followers that her 19-year-old daughter Christina "is now back at Georgetown. First day of classes as a junior. So proud of her and miss her so much already."