Now, hes returned to the role in Universals prequel/sequel/spin-offThe Huntsman: Winters War.

While Chris Hemsworth scowls and battles, these guys bring the warmth and the humour.

So Nick, you were in the firstHuntsmanfilm.

What was your dwarf advice for Rob going into this one?

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Nick Frost:Short arms!

Keep your arms short.

Rob Brydon:Keep your arms short, as if youre trying to put them in your pockets.

NF:Little steps…

RB:Small steps.

Um…

NF:Um… yeah…

RB:Look up a lot.

Look up, because thats your viewpoint on the world.

And, think dwarf.

NF:Yeah, think small.

RB:Think small, be small.

NF:Class of 13!

RB:Mmm, I went in all ears, all eyes.

I used to go into his trailer and just sit there and say I want to learn.

NF:And he did!

RB:I learnt so much.

So, I would strip down to my pants and just walk up and down.

RB:I could see the musculature…

NF:You could see how it works.

RB:I could see the spine… it was hypnotic.

Ive been unable to forget it.

And whats it like being put together and being told to be a double act?

How do you build up that rapport?

NF:I dont think we were told to be a double act.

It was always about the characters, and about the film.

I think we worked well together.

Because I admire him, and to make someone you admire laugh is a nice feeling.

And he would do it back to me, it was always fun.

And you did a little bit inShaun Of The Deadas well, Rob.

Have you known each other since back then?

Weve never actually worked together, but as I say Ive known him for years.

Did you get freaked out at all by that, or was that just me being weird?

I think of her as Sheridan, I couldnt have told you that her character was called Rudi.

I just know she was in it, you know?

We didnt really do many scenes…

So for me it was just a delight to work with her!

Because she is one of the best actresses in the country.

She is the best audience.

Id say that about Sheridan Smith.

Never mind being a great actress, shes so good as an audience.

And was there any room for improvisation in this?

Because I was quite surprised that some of the humour was quite grown-up.

Was that all in the script, or did some of that come from you guys?

NF:Yes, absolutely there was.

But, you always do the script, you know?

Yeah, we were encouraged to improvise.

Also, not forced to do it.

But everything we wanted to do, we were kind of allowed to do.

RB:I think some of it has ended up in the finished cut, you know?

Little moments here and there.

Its not much, just little bits.

Could you give any examples of those?

NF:[jokingly] No!

[Laughing] And on that note I think Ive run out of time now.

NF:Okay, thats enough!

[laughs]

RB:Oh, I know one thing!

There are little bits like that.

Theres the scene when were tied up [turns to Nick]… theres something there isnt there?

NF:Yeah… theres lots and lots of little bits.

Same mum [a line, again, which gets a big laugh].

RB:That was ours.

RB:There a lots of little bits like that.

Rob Brydon and Nick Frost, thank you very much!

The Huntsman: Winters Warreaches UK cinemas on Monday 4th April 2016.