How old is Empress Celene?

She was born in 9.04 Dragon, became Empress in 9.20 Dragon and Inquisition covers 9.41-42 Dragon. Which makes Celene in her mid-late 30's in DAI.

From the Wiki dragonage.wikia.com/wiki/Celene_Valmont_I

Celene was 16 when she ascended the throne in 9:20 which would make her 36 around the start of the Inquisition.

Celene Valmont I <-- link to Celene's DA wiki page

some things in short:

• Celene Valmont was born in 9:04 Dragon, that makes her 37 years old during the events of Inquisition (9:41)
• when she was 16: her parents were murdered, she took the throne after that

I am curious what will happen when Celene dies. She's unmarried, no children, her nearest relation and heir was in open rebellion, not to mention that she isn't a spring chicken anymore. I imagine Orlais will rip itself apart no matter who rules now.
The same problem with Ferelden, even if you get a stable kingdom by marrying Alistair and Anora, nearly a decade has passed and no heir.
The future will be an interesting time.

Dragon Age 6: Everything is On Fire. Again.

I'm pretty sure Gaspard does have children. I seem to recall that someone was mentioned as being married to one of them. Will have to check where I saw it.

36 or so? Maker's Breath I'm glad I asked! If I'd have guessed judging from her appearance in WEWH I'd have put her at around 70 or so! That of course contradicted some of the other implications that she was much younger than that which is why I finally decided to put the matter to rest by asking the experts here on the forum.

I'd have put Gaspard in his forties and Florianne in her thirties. Its really interesting to know their real ages and what they actually look like without their masks. I found it a little absurd that I was choosing the leader of a nation without even knowing their faces or ages. I haven't read any of the DA books though I think I should do so, particularly the Masked Empire as I'm starting to get the impression I'd understand WEWH better if I had.

In any case, thank you to everyone who responded as I really appreciate you all taking the time to indulge my curiousity. I always pick Celene, for various reasons and usually reunite her with Briala in hopes that together they can build a better future for both human and elven citizens of Orlais. It seems like its not actually too late for Celene to produce an heir though she'd best be quick about it at her age.

Then again if they are desperate enough they may accept one, just look at Alistair. 

Exceptional circumstances. It was the Blight and the alternative was Loghain. Also, the nobility in Ferelden aren't as "high" as those in Orlais.

She has like 50 physically.

Why do you ask? you want to marry her?

Doesn't this make her younger than Anora then at the start of Inquisition? They really don't age well in Orlais.

You mean the Alistair who ends up doing BETTER than his glory seeking Brother, and cold shrew of a Wife?!