Despiteher best efforts,Angelina Joliecouldn’t keep it together as she sent sonMaddoxoff to college.

“I … had the big glasses, and the amount of times I turned and waved. I do know it was the one moment in my life I think I turned around six times before the airport just…,” Jolie recalled toEntertainment Tonightat the D23 Expo in Anaheim, California, on Saturday. “And he sweetly stayed and kept waving, knowing that I was going to keep turning around. You could feel he knew he couldn’t leave.”

“I am very proud of him. He is ready — he’s good,” she also toldExtra.

Courtesy Yonsei University

Angelina Jolie and son Maddox

Jolie was seen dropping Maddox off at school in avideo shared to Instagramin which she told students she was “trying not to cry.”

She was also seentouring the campuswith officials in photos that showed her and Maddox arriving at Yonsei, where asource told PEOPLEhe will study biochemistry.

TheEternalsactress toldETthat sending her son off was emotional, but also heartwarming, considering how his siblingsPax, 15,Zahara, 14,Shiloh, 13, and 11-year-old twinsKnoxandViviennecame together to bid him adieu.

Angelina Jolie and Maddox tour Yonsei University in South Korea.Courtesy of Yonsei University

Angelina Jolie and Maddox tour Yonsei University in South Korea

Jolie continued, “When you know that your kids love each other and you see the way they all – without any kind of prompting or pushing – give each other notes, hug each other, take each other, support each other, then you feel like they’re going to be okay and they’re always going to have each other.”

Monica Schipper/Getty

Angelina jolie

“I miss him, I miss him,” she said. “Or I’ll just get out there. It’s not like I haven’t set my plane tickets.”

A source previously told PEOPLE that Maddox was taking steps to prepare for his big move, and had been accepted into other universities, but chose Yonsei.

“He has been studying Korean language,” the source said. “He has lessons multiple times a week to prepare.”

Alberto E. Rodriguez/Getty

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Yonsei is a private research institution in Seoul that was established in 1885, with its current iteration opening its doors in 1957. The university is part of South Korea’s three elite SKY universities and is regarded as one of the best in the country.

“I look forward to all he will do,” Jolie previously told PEOPLE. “[I am] nothing but proud.”

source: people.com