The 23-year-old actress says she had the habit of sleeping in school and had to face a punishment when she was caught.
"I was given a punishment to clean the desk for one week. What I did was - which one shouldn't do - but I used to go to school and sleep in the bathroom. So, one day the teacher caught me sleeping in the bathroom. She went to check why is this girl missing," Alia told reporters.
"Then I had to wipe the desk for a week. Very bad thing to do. So please don't sleep in class, sleep at home," she added.
The "Udta Punjab" star was speaking at a special event organised to celebrate Children's Day.
Alia interacted with the children of ACORN Foundation and answered some of the questions by her young fans.
"I asked one of the kids my age and he said 32! I am a kid too and hence wanted to celebrate children's day with you. I feel so happy here. I have never done this before but I wish to celebrate children's day like this every year," she said.
The actress shared that "every possible name around 'aaloo' (potato)" is her pet name and confessed being a foodie.
"Since childhood, I am a foodie. I am very desi so I love to eat gulaab jamun, rassgulla, moong ka halwa. Burgers, pizzas are very boring, but when these items are kept in front of me, I have to eat them."
Alia sang songs from her film at the event and also shook a leg along with the children.
On the film front, the actress is geared for her next release "Dear Zindagi" scheduled to hit theatres on November 25. The film stars Shah Rukh Khan, Angad Bedi, Kunal Kapoor among others.