Get rid of the references in the lede (ones that are repeated throughout the main body of the article) as they are supposed to be covered in the main body of the article. No need of repeating them, per WP:LEAD.
The reference in the first sentence is required for her work, right?
"who is pre-dominantly known for her work in Hindi films" – Bollywood is more preferable.
Done
Add the genre for My Friend Pinto in the sentence as you have the genres for the other films mentioned in the sentence where it is.
Done
Anurag Kashyap (2011–2015) → (2011–15)
Done
Early life
"kindergarten at Hebron School, Ooty, then did a short" – replace "then" with "and".
Done
Career
"Koechlin, after moving to Mumbai, gave the audition" –you an just say "auditioned" instead of "gave the audition".
Done
You say that Dev D. received positive reviews but right after the sentence, you have written a review with only two-and-a-half-star. Have one which reflects the fact.
Added Review
"While Shubhra Gupta of The Indian Express mentioned her as" – I don't understand the purpose of "While" in the beginning of the sentence.
Removed
"Next year, she acted" → "The following year, she acted"
Done
"crime-thriller Shaitan with a large cast" – I don't know about the film but if by "large cast", you mean "ensemble cast", I think the latter is better.
Done
There is no reference for her Stardust nomination for her role in Shaitaan.
Added reference
" Best Supporting actress for" – the "A" of "actress" needs to be in capital as it's a proper noun.
Done
"Premiered at the 2012 Toronto film festival," → 2012 Toronto Film Festival
Done
"Vassilis Vassilikos novel Z (1967)" → "Vassilis Vassilikos' novel Z (1967)"
Done
Could you merge the two-line paragraph about her film Happy Ending to the above or below paragraph?
Done
The same for the mini web-series Man's world.
Done
"opposite veteran actor Naseeruddin Shah" – "veteran" is so WP:NPOV.
Removed
"The film had it's world" → its
Done
"at the Dubai International Film Festival (DIFF) in December" –which year?
Done
On stage
"She took to Twitter to make the announcement and shared the official Facebook page" – it is pretty similar to the sentence mentioned in ref 66.
Removed
Personal life
Ooty is already linked in the Early life section.
Done
In Oct 2014 is not acceptable. Use the full form.
Done
"Kashyap and Koechlin have shared a healthy relationship" – what does "healthy relationship" mean here?
Removed
In the media
The first two paragraphs in the section do not belong there. Merge it to the Personal life section.
There is no reference for her Stardust nomination for Shaitaan.
Done
References
Ref 1 – Mail Today needs to be in italics as it's a newspaper.
Done
Ref 3 – It's The Indian Express. Also, it needs to be wiki-linked. Also the date like "2 Sep 2011" is not acceptable. The same applies for other ones in the section.
Done
Ref 7 – It's The Times of India.
Done
Ref 10 – Tehelka is a magazine so italicize it.
Done
Wiki-link Hindustan Times and India Today in ref 12 and 13, respectively.
Done
Ref 19 - ditto
Done
Ref 20 - You missed an "a" in Bollywood Hungama
Done
Ref 21 - Rediff.com needs to be wiki-linked.
Done
Ref 32 - italicize THR.
Done
Ref 34 - Link the publisher.
Done
Ref 36 - italics please.
Done
Ref 37 - It's Box Office India
Done
Ref 42 - Link Filmfare.
Done
Ref 45 – ditto. Also, it needs to be in italics there and in ref 45.
Done
Ref 48 – wiki-link Firstpost
Done
Ref 49 - needs an access date. Also, how is it possible that it is September 2016?
Done
Ref 52 - no italics please.
Done
Ref 53 - The Times of India
Done
A lot of references are missing accessdates.
Have added accessdate to references that I personally added, but, how do i go about the refrences I did not add? Add the present date?NumerounovedantTalk 9:41, 26 January 2016 (UTC)
Yeah, that's okay IMO.
Done
I see a few instances of WP:SHOUTING in the section.
Done
@FrB.TG: Thank you for taking up the review! Have made most of the asked changes & amends, and working on the rest. Have added information in the Media image and Personal life sections (They were in my sandbox, just wanted them to be reviewed too.) Could you take a look through them too? Thank You! 9:55, 26 January 2016 {UTC)
I have seen that in some places throughout the article, you have used her first name, which is quite informal. Please make sure that in the prose (except the quotes of course) you have used her last name.
Changed to Koechlin or pronoun
"it also earned her another Best Actor in a supporting role nomination at Filmfare" – can be rephrased with something like "for the film, she earned her third Filmfare Award for Best Supporting Actress nomination"
Changed
"The Video went viral with" – The video.
Done
"John Beifuss of the The Commercial Appeal called Koechlin's performance Oscar nomination" – I think you can remove the Oscars bit as it's already there in the quote that makes it repetitive.
Removed
"many stage plays in India, most recently" – see WP:CURRENTLY.
Removed and Rephrased
I don't think that using "the actress" is a pretty good choice as it's so magazine-y.
Changed
In Media image section: "Kalki's also associated with Fashion brands" → "Koechlin is also associated with fashion brands"