What emotion would it be toughest act?

Fear
Surprise
Anger
Sadness/sorrow
Happiness

anger and happiness would be easiest. Sadness the toughest.

Sadness would be easy for me - I've got a lot to draw from to illicit the emotion.

I think laughing convincingly would be hard for me.
I can fake it, sure, but it just doesn't sound real if I do. I can do the polite laugh (like when a co-worker tells a joke that's not all that funny) or the chuckle - these are both kind of acknowledgements for others or a reaction to something mildly amusing, but to do a sustain hysterical laugh - don't think I could "act" that unless it came naturally.

I dont think any would be hard for me to act..i always look sad or angry, even when im not..

Even as a baby, I looked angry, says my daughter.

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Its tougher to be vulnerable than to actually be tough.

I think fear is a tough one.

Love is pretty hard to pretend.

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I hate insomnia. Oh yeah. Last year I had four cases of it, and each time it lasted three months.

Sorry, not exactly an answer to the question. But I couldn't help but thinking about this clip in which we hear how to tell fear from anger. From the movie Serenity (2005):

https://clip.cafe/serenity-2005/bit-of-a-rockety-ride/

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There's an old Bogart movie were he has a smaller role and someone gets the drop on him and he's suppose to look fearful, but he could not pull it off. It's near comical. Wish I could think of the name of the movie it was one before he became a big star.

Are you actually angry or only look like it?

Well considering i was a baby i dont know.

Probably just look angry.

Copulation male or female. Not an emotion per se, but scenes like this are difficult I would imagine.

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I think it's gonna be person-specific, for sure. Some people can cry at the drop of a hat, others almost never do, let alone on cue.

For me, I think surprise would be the hardest. Fear or anger are relatively easy to fake.

I meant right now.

I think sadness would be the hardest to act.

No, im not angry or sad..but its just how my mouth sits

How specific could we go? For me, it wouldn't just be the emotion, but the context.

The hardest would probably be trying to act smooth and seductive. I don't have a single clue how I would approach that. Sort of like that scene in the Jumanji remake.

My father, older sister and i have this permanent frown. Its genetics

Crying

Fear is a very instinctive reaction that doesn't show very much, more like an imploding kind of emotion that stifles us.
I guess it's almost impossible not to overact fear in film.
And in real life, nobody screams when they stumble upon a dead body

Good thread.

I'd say of those fear is hardest.