Main

• Sanjeev Venkat / Shreekumar as Mutharasan aka Muthu: Thanikachalam's son; Neelambari's step-son; Marudhu, Poongodhai, Janani and Karthik's half-brother; Chitra's widower; Swetha's ex-fiancé; Vennila's husband; Ruthra's father. (2017–2018) / (2018–2021)
• Nachathira as Vennila: Mutharasan's second wife; Ruthra's step-mother; Swetha's arch-rival. (2017–2021)
• Chaitra Reddy as Swetha: Karunakaran's daughter; Mutharasan's ex-fiancée; Yuvraj's ex-wife; Vennila's arch-rival. (2017–2021)
• Yamuna Chinnadurai as Chitra: Mutharasan's first wife; Ruthra's mother. (2017–2021) (Dead)
• Fathima Babu as Neelambari: Karunakaran, Veera and Rani's sister; Thanikachalam's widow; Marudhu, Poongodhai, Janani and Karthik's mother; Mutharasan's step-mother; Ruthra's step-grandmother. (2017–2021) (Dead)

Supporting

• Jenithra as
  • Ruthra: Chitra and Mutharasan's daughter; Vennila's step-daughter. (2020–2021)
    • Lisha as Child Ruthra (2018–2020)
  • Uthra: Ruthra's lookalike and former enemy. (2021)
• Ravi Varma as Thanikachalam: Neelambari's husband; Mutharasan, Marudhu, Poongodhai, Janani and Karthik's father; Ruthra's grandfather. (2017–2018) (Dead)
• Barath as Marudhu: Neelambari and Thanikachalam's elder son; Poongodhai, Janani and Karthik's brother; Mutharasan's half-brother; Kalai's husband. (2017–2021)
• Gayathri / Vinitha as Kalai: Vennila's friend; Marudhu's wife. (2017–2018) / (2018–2021)
• Minnal Deepa as Poongodhai: Neelambari and Thanikachalam's elder daughter; Marudhu, Janani and Karthik's sister; Mutharasan's half-sister; Azhagappan's wife. (2017–2021)
• Aravind Khathare as Dr. Azhagappan: Poongodhai's husband. (2017–2021)
• Nivisha Kingkon / Pooja / Sreenidhi Sudarshan / Shalini Rajan as Janani: Neelambari and Thanikachalam's younger daughter; Marudhu, Poongodhai and Karthik's sister; Mutharasan's half-sister; Gowtham's wife. (2017–2018) / (2018–2019) / (2019–2020) / (2020–2021)
• Surjith Ansary as Gowtham: Nandhini's brother; Janani's husband. (2019–2021)
• Haris Athitya / Jeeva Rajendran / Bavithran as Karthik: Neelambari and Thanikachalam's younger son; Marudhu, Poongodhai and Janani's brother; Mutharasan's half-brother; Simran's husband. (2017–2018) / (2018–2019) / (2019–2021)
• Dhanalakshmi as Simran: Pooja's sister; Karthik's wife. (2020–2021)
• Sivakumar as Karunakaran: Veera, Neelambari and Rani's brother; Swetha's father. (2017–2018) (Dead)
• Murali Krish as Annamalai: Mutharasan's childhood friend. (2019–2021)
• Magima Devi as Rani: Karunakaran, Veera and Neelambari's sister. (2017–2019)
• Manikandaraj Major as Veera: Karunakaran, Neelambari and Rani's brother. (2019–2021)
• Vijay Lokesh as Gokula Krishnan: Azhagappan's fake cousin; Vennila's cousin. (2020–2021)
• Tejas Gowda / Shyam as Yuvaraj: Swetha's ex-husband. (2018)
• VJ Mounika as Varsha: Swetha's cousin. (2019)
• VJ Sasikala Nagarajan as Nandhini: Gowtham's sister. (2019)
• Egavalli as Mohini: A ghost. (2020)
• Akshaya Kimmy as Akshaya: Swetha's friend. (2019–2020)
• Kiruthika as Pooja: Simran's sister; Ashok's wife. (2019–2020)
• Ranjith Babu as Ashok: Pooja's husband. (2019–2020)
• Sree as Nikhila: Swetha's friend. (2019–2020)
• Sairatheya as Karunakaran's wife; Swetha's mother. (2017–2019)
• Akila Krishnan as Roshini: A beautician who helps Vennila from Swetha. (2020)
• Ravishankar as Mutharasan's family doctor. (2019)
• P. R. Varalakshmi as Kulangini (2019) (Dead)
• VJ Sharanya as Swetha's friend. (2017–2018)
• Hensha Deepan as Deepa: Swetha's friend. (2018–2020)
• Sivanya Priyanka as Swetha's friend. (2018–2019)
• Tharani as Swetha's friend. (2018–2020)
• Raj Mithran as Powerful exorcist. (2017–2018)
• Munish Rajan as Shanmugam: Mutharasan's friend. (2017–2018)
• Vincent Roy as Thennarasu's father. (2017–2018)
• Varun Udhay as Thennarasu: Mutharasan's cousin. (2017–2020)
• Sujatha as Thennarasu's mother. (2017–2020)
• Duraimani as Gowtham's cousin. (2019–2020)
• Ravivarman as Natrajan: Thennarasu's brother. (2017–2018) (Dead)
• Sudha as Vennila's mother. (2017–2018) (Dead)
• Sumangali as Chitra's mother; Ruthra's grandmother. (2017–2018) (Dead)
• Meenakshi as Vennila's grandmother. (2017–2018) (Dead)

Special appearances

• Madhan Pandian
• Subalakshmi Rangan
• Siddharth Kumaran
• Ashwin Karthick
• VJ Kathir
• Archana Chandhoke
• Zaara Vineeth
• Kousalya Senthamarai
• "Saregamapa" Ramani Ammal

Launching

A first look for the series was officially released on 4 February 2017, together with the first look for Poove Poochudava.^[5] Cast members from both shows were interviewed on Puthandu 14 April 2017 on the Chithirai Puthandu special programs hosted by Deepak Dinkar and Archana Chandhoke.^[6]

This horror-based love story was initially produced by V. Shankar Raman for K Studios. S. Sabreesh Kumar under Monk Studios took over the series in 2017 and continued producing the show till the series' end in 2021.^[6]

Casting

Popular Tamil TV actor Sanjeev was selected to portray the lead role as Mutharasan. In May he left the show because of an inconvenience of his role. Shreekumar replaced him in the role of Mutharasan from episode 271.^[7] Malayalam actress Nachathira made her TV acting debut with the series by playing Vennila. Chaitra was selected to portray the second leading role and main antagonist as Swetha. Fathima Babu joined the series as the main antagonist Neelambari and Yamuna Chinnadurai was selected to play Mutharasan's first wife who becomes a ghost. Besides Minnal Deepa, Barath, Aravindh Khathare, Vinitha and Surjith Ansary were added to the cast.^[8] The series features many new cast entries.^[9]

Broadcast history

In Zee Tamil series history, Yaaradi Nee Mohini is the first series to contain over a thousand episodes. Programming head Siju Prabhakaran, creator Tamil Daasan, producer Sabareesh Kumar, director Priyan and the entire team celebrated the special occasion.^[10]

Ratings

It became the fifth-most watched Tamil television programme in the years 2017 and 2018 with 9.220 million impressions.^[11] From week 1 to till now, it maintained top 10 positions in TRP chart rating for most watched Tamil television programs.^[12] This Serial Became Popular and Listed At Top 5 Position In BARC Rating Charts after Shreekumar replaced Sanjeev.