Indian Cinema experiences a barter with its own regional counterparts often, wherein apart from the usual remake from South to Hindi, the other way round is also witnessed. Don’t believe Us? So, here are some of the finest examples of the recent past:
1. 3 Idiots (2009) and Nanban (2012):  
One of the finest evergreen classics which slammed the Indian education system; this Rajkumar Hirani’s masterpiece was remade by one of the celebrated directors of Tamil cinema S. Shankar. Renowned actor Vijay brought Aamir Khan’s charms in his performance whereas Jeeva was Sharman Joshi and Srikanth essayed R. Madhavan’s character respectively. The film released on Pongal earned huge cash at the box office even in its dubbed Telugu version!
PS:  The only difference between the two, except the special effects work, was a song in the pre-climax!
2. OMG: Oh My God! (2012) and Gopala Gopala (Telugu/2015):
A contemporary cult-classic based on religion and the business over it was adapted in 2015 in Telugu starring the leading stars; Pawan Kalyan and Venkatesh. Mithun Chakraborty reprised his role as a godman and the film equally did well at the critics as well as box office categories alike.
3. Jolly LLB (2013) and Manithan (2016):
The National Award winning courtroom satire was re-lived in Tamil where veteran actor Prakash Raj portrayed the role of Boman Irani as the ruthless lawyer. The film, directed by I. Ahmed was appreciated for its efforts to bring the courtroom reality on screen in Tamil cinema and did exceptionally well.
4. Don (1978) and Billa (1980 and 2007):
A thriller that also earned Amitabh Bachchan the title of “Angry Young Man”, the film was remade in Tamil with the same story where Rajinikanth played the lead role after reaching his zenith of his career. Unlike the 2006  Hindi version starring Shah Rukh Khan, which had a different twist, the film was Tamil-remake in 2007 used the same old storyline with a fresh treatment starring Ajith Kumar. And yeah… all of them were equally blockbusters!
5. A Wednesday! (2008) and Unnaipol Oruvan (Tamil) and Eeenadu (Telugu) (2009):
A powerful film based on terrorism by filmmaker Neeraj Pandey was brought to Tamil cinema by the same production company UTV. Veteran star Kamal Haasan essayed the lead role in the place of Naseeruddin Shah (of Hindi version). The actor also scripted the adaptation as well as the dialogues for the film.  Anupam Kher’s role was done by Mohanlal in the Tamil version whereas in the Telugu version; it was done by Venkatesh.
6. Khosla Ka Ghosla (2006) and Poi Solla Porrom (2008):
A contemporary cult of Hindi cinema and even a surprise blockbuster, the film was remade in Tamil with the same producer UTV Motion Pictures and the actor cum director AL Vijay. Celebrated veteran actor Nasser did the role of the Boman Irani as the shrewd businessman.
7.  Dabangg (2010) and Osthe (2011) and Gabbar Singh (2012):
Who would dare to remake a Masala blockbuster like “Dabangg”?
Just like the original version revisited the dialogue and action style of the ’80s, the Tamil installment revisited the charm of Rajinikanth’s films in 80’s mixed with even more loudness and managed some decent success too.  The actor Silambarasan succeeded to level Salman Khan.  The Telugu version starring Pawan Kalyaan, Shruti Hassan, and Abhimanyu Singh was one of the highest grosser of Telugu Cinema which was also led to the second installment!
8. Band Baaja Baraat (2010) and Aaha Kalyaanam (2014):
With the producers Yash Raj Films entering the Tamil market with the remake of their own film, the film starred Vaani Kapoor along with Nani (of “Makkhi” fame) blew trumpet down South too.
9.  Soldier (1998) and Villu (2009):
The 1998 Bollywood Action Blockbuster starring Bobby Deol and Preity Zinta was remade in Tamil in 2009 directed by Prabhu Deva starring one of the famous actors Vijay in a double role of both father and son.
10.  Lage Raho Munnabhai (2006) and Shankar Dada Zindabad (2007):
One of the cult-classics of Hindi Cinema by Rajkumar Hirani was adapted in Telugu starring Chiranjeevi and Sayaji Shinde in the lead where Dilip Prabhavalkar reprised his role as Mahatma Gandhi.
11. Delhi Belly (2011) and Settai (2013):
 The film was remade in Tamil where frankly, the charm of the original was barely matched; thanks to the song and dance nonsense. With the same producers here too (UTV Motion PIcutres), the song “Bhaag DK Bose” was even remade here too!