Alia, who is the daughter of Mahesh Bhatt, had a tailor-made entry into Bollywood with Karan Johar's hit 'Student of the Year'.
The 21-year-old actor, however, impressed critics in her subsequent outings in 'Highway' and 'Two States'.
In her fourth film, Alia plays a gusty heroine, who is a woman of today.
"Kavya (her character) is very fiery and lively girl. She wears her heart on her sleeves. Coming from a small place, she holds her values dear but she is a woman of today. She has a strong opinion. This is why she is the one who is carrying the hero in the film's posters," Alia told PTI in an interview.
The actress admits that the pressure has increased now that she has three films behind her but that would not influence her film choices.
"The pressure is always there. But I know that I want to do good films. I want to stand out with all my characters and I want to give the audience as much variety as possible," she says.
She has reteamed with her 'Student of the Year' co-star Varun Dhawan for a second time for 'Humpty Sharma'. Alia says their chemistry will look good because they were more comfortable with camera this time.
"The chemistry is good because of the characters we are playing. Also, I think we were not as nervous and as confused about what we were supposed to do in front of the camera. It became very organic," she says.
After crooning for 'Sooha Saha' in Imtiaz Ali's 'Highway', Alia took to mic again to sing Rahet Fateh Ali-rendered 'Samjhawan' in an unplugged version.
The self-confessed bathroom singer was not scared to take on the popular number.
"I was not scared because I am not a professional singer. I knew that if I mess up I would not get as much flak. I love to sing. It gives me a certain sense of peace. I am not singing to impress anybody and I am very proud and happy that I got an opportunity to sing this song," she says.
Ask her whether she would like to take it beyond, Alia says she wants to explore her singing side further.
"Definitely, I want to explore it. I was advised by A R Rahman to take my singing seriously and I am thinking about it."
The film has been directed by debutant Shashank Khaitan and produced by Karan Johar's Dharma Productions.
'Humpty Sharma Ki Dulhania', slated to release this Friday, also marks the debut of TV actor Siddharth Shukla of 'Balika Vadhu' fame.