Olivia Wilde visited her old school on Friday (Apr 4).
The 30-year-old actress took her fiancé Jason Sudeikis to Phillips Academy in Andover, Massachusetts, where she formerly attended High School, to surprise their students.
The couple walked around the historical campus, which is located just over 20 miles from Boston, before posing for photographs with the staff and several students.
The pair then went on to spend some time in the photography classroom, where they helped youngsters develop some of their stunning shots.
Lily Zildjian, a senior student at the Academy, told People.com: "While I was working, I heard the door open and there was Olivia and then Jason! They even helped me and told me which negatives they liked the best.
"They were such nice people. It was completely unexpected to meet them and such a cool experience to just talk with them!"
Meanwhile, the 'Tron: Legacy' star is due to give birth to her first child, a baby boy, next month, but she doesn't appear to be letting her pregnancy slow her down.
Although, the brunette beauty recently admitted she was having problems controlling her frequent need to urinate at the Golden Globe Awards in Los Angeles in January.
She took to Twitter just before the event, tweeting: "Hoping one of the GG organizers is also 6 mos preggo and in charge of placing a porta-a-potty on stage. #fingerscrossed #legscrossed (sic)"