As the love-smitten guy in a group of five friends, who goes out of his way to help his crush, Prasanna is super-convincing in his debut film, 5 star (2002).
Prasanna plays Chandran, an aspiring director with quite some doubts and insecurities, in the 2004 romcom, Azhagiya Theeyae.
Prasanna, as Krishna, is all cutesy in one of the best romantic films of our times, Kanda Naal Muthal, directed by Priya. His adorable chemistry with Laila takes the film a notch higher.
As the moody and licentious Dhaya, Prasanna delivers his career-best performance in Mysskin's Anjathey. The way he aces the character's unhinged, sinister mannerisms has to be seen to be believed.
As the loving parent of a 10-year-old, who has to save his daughter from a pedophile, in a foreign country, Prasanna brings your worst fears come true in Arun Vaidyanathan's Achamundu Achamundu(2009).
As an engineer, who gets conned into being a part of a bank heist, Prasanna is brilliant in Naanayam (2010), directed by Shakti Soundar Rajan
Prasanna comes out largely unscathed in his first rural role of a local North-Madras rowdy, named 'Manja' Ravi, in the 2010 film Bana Kaathadi, co-starring Atharvaa and Samantha Akkineni.
As the spoiled brat living an unhappy marital life, who seeks the help of his trip-acquaintance to help him kill off his dad, Prasanna gives you the chills in Muran ((2011).
Prasanna is in his natural best as Dr. Robin Joseph, a cardiologist who is shocked to discover his wife's secret affair on his first wedding anniversary, in Chennaiyil Oru Naal (2013).
As the sprightly Raghu, who finds out about his erectile dysfunction at the brink of finding love in an arranged marriage, Prasanna emerges heroic in KSS, even when his 'masculinity' is at stake.
As the son of Power Pandi, who doesn't really understand his father's worth, till things get murky, Prasanna makes his character totally relatable in Dhanush's debut directorial (2017).
Prasanna ably portrays a CB-CID inspector, who specialises in forensic investigation - complete with the body language and mannerisms of a young cop - in Arun Vaidyanathan's Nibunan.
As Balki, a engineering college-topper, who turns a sociopath who seduces women, records their conversations and blackmails them for money, Prasanna is pure evil in Thiruttu Payale 2.
As Manohar, who helps his friend, associate and flatmate, Kaniyan Poonkundran, with his detective cases, Prasanna brings the Tamil counterpart of Dr Watson alive in Mysskin's Thupparivaalan (2017)
Prasanna plays a middle-aged man with a paunch, who invents a controversial herbal fuel a.k.a Mooligai petrol, and subsequently gets embroiled in a forgery case in the OTT series, Thiravam.
