I read in a BuzzFeed article that she does not know her date of birth. How that is possible, who knows?
This is the Media People. You want reality, look out a window.

That's the thing. Even she doesn't know her exact age, since her mom never kept track of her exact birth date.

So she was born in 1978? Another source says 1976 and someone on imdb posted 1987.

I knew her VERY slightly in the mid-90s (friend-of-a-friend). She is 35-36 years old.

http://www.radiotimes.com/news/2013-04-15/meet-the-british-stars-of-ga me-of-thrones
Found this little tidbit. I don't buy it for a minute.

I have come here to chew bubblegum and kick ass and I'm all out of bubblegum.

Agree, too many inconsistencies. While not totally accurate, using the known (supposed) graduation in 2005 and making certain assumptions such as graduation secondary school at 18 and 4 years in Drama Centre London. She could have graduated earlier or later from secondary and it's possible that she overlapped secondary with beginning of BA program. I think 1983 is the most likely but it could easily fall within the range of 1980-1985. As of 2014, this would make her 31 2-3 years.

I have come here to chew bubblegum and kick ass and I'm all out of bubblegum.

So much inconsistencies, so when was she really born?

She's 36!!!

If she graduated from school in 2005, she is probably around 29 yo.

http://www.listal.com/gwendoline-christie

so that would be her 26th birthday today. if that is so: happy birthday

Her listal page has her birthday listed as April 7, 1987 making her 25. I don't know whether or not that is true because there are no other sites that have her age. I always thought she was in her 30s. Who knows.