Chinnathambi had crossover episodes with Aranmanai Kili (364-373 episodes).

Myna Nandhini as Alabarai Myna (episode 335 - 370).Ravishankar/Ravi Varma as Vasudevan (Gautham's father).Sairatheya as Damayenthi (devotee of Kadambavanathu Amma).Udhay as Lingam (a man who gives loan for auto, died in serial).Suresh as Sethu (Shenbagam's husband, episode 174–270).Subageetha as Shenbagam (Sevvanthi's sister, episode 174–273).Hema Rajkumar as Sevanthi (episode 174–272, dead in serial).Britto as Seval (Chinnathambi's friend).Priya as Kanchana (Varsha's mother and Nandhini's aunt).Aravish / VJ Pappu as Aravind (Pappu) (Nandhini's younger brother).Shwetha as Shwetha (Nandini's sister-in-law).Krishna Kishore as Nandini's elder brother.Sadhana as Prabhavathi (Nandhini and Arvind's mother).Shridhar as Rajasekar (Nandhini, Arvind's father).Rekha Suresh as Shanthi (Malar's mother and Chinnathambi's aunt).Shwetha as Revathy (Chinna Thambi's cousin).Kammapandi as Samudram (Malar's father, Chinnathambi's uncle).Rheema as Malar (Chinnathambi's cousin).Anila Sreekumar as Annalakshmi (Annam) (Chinna Thambi's mother, Malar's adoptive mother).Girish as Rathnasamy (China Thambi's father).Her father-in-law brings Chinnathambi and changes his looks into something more modern, which shocks everyone in the house, including Nandini and chinnathambi's mother. She remarks on the clothes and hair he has, saying he has a priest's look. One day, her father-in-law (Chinnathambi's dad) hears her speak badly of chinnathambi's looks. At first, Nandini hates her life in the town, with small issues such as not being able to eat meat, or wear modern clothes. Swetha accompanies Nandhini to help her get accustomed to the new environment. Then, Nandhini moves to the village with Chinnathambi. On the day of marriage, Gautham is arrested for a false accusation, and a fainted Nandhini marries Chinnathambi, on the request of her parents. Will they become friends and love each other? Will their love overcome their contrasting personalities, cultures, and values? Chinna Thambi keeps himself away from Nandhini because he is a Baal Brahmachari. Coincidentally, one day Chinna Thambi and Nandhini meet and get into a heated argument. Nandhini's marriage is fixed with Gautham (Lokesh), and they get engaged. On the other side, Nandhini is opposite like Chinnathambi, But Nandhini has a good heart. He obeys his mother Annalakshmi sternly and loves his family. Chinna Thambi is very naive, having moral values. It is a story about Chinna Thambi ( Prajin), an innocent village boy from Chinnalapatty who falls in love with Nandhini (Pavani Reddy), an arrogant girl from Chennai.

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