This location is more of an extension of the Lawrence School post that was published a while ago as in this church is located within the Lawrence School premises in Lovedale. Minsara Kanavu (Sapnay in Hindi) is the only movie that we can think of which has been shot inside this church. But like with most other locations, we are sure there are more film songs & sequences that have been shot here. Please do add any such locations that you know of, in the comments section.

About the location (from Wiki):
The Lawrence School is an educational institution in Lovedale, located near Ootacamund, Tamil Nadu, India and named for its founder, Sir Henry Montgomery Lawrence. The Lawrence School has a sprawling campus of 750 acres. Lovedale, six kilometres from Ootacamund, located at a height of 7200 feet over sea level, slightly lower than the Dodabetta peak (altitude: 8000 feet), the highest peak of the Nilgiris mountain range.

Movies shot at this location:
Anbendra Mazhaiyile from Minsara Kanavu
Climax scene from Minsara Kanavu (from the 2 min mark)