The actual Christoper Walken has some of the same features as your drawing.

That man in your drawing has a giant fore-head.

The actual Christoper Walken does have a large fore-head but not to the same degree.

You exaggerated his forehead by a lot.

Christopher walken has very squinty eyes and I love how you included laugh lines in his face.

The pose is actually kinda boring to be honest.

I would like to see you try doing more dynamic poses with this drawing.

I personally struggle with working out the poses in my own pictures.

Draw a stick man version of the pose first if it helps.

Build onto the stick man by adding more details on top of it.

I seen other animators advise others to draw the forms before adding details.

Just do whatever works for you.

A background could liven up the picture a bit.

Perhaps walken is posing for his driver license photo.

He could be standing on a launching pad before his rocket pack activates.

Use your imagination to create interesting poses with your drawings.

I will have to do the same and take my own advice.

Do another Christoper walken drawing but with a more dynamic pose.

As always; I look forward to your new work.

- Mightydein