Well ... an Ondes sighting, actually

We rented the very lame movie "Aliens in the Attack" ... definitely NOT RECOMMENDED!

In the opening sound track there is a part that sounds like theremin, but in the credits (way, way down at the bottom) it gave credit to a Ondes Martenot musician.

I couldn't find any reference to a movie called "ALIENS IN THE ATTACK".

Did you perhaps mean "ALIENS IN THE ATTIC" or "ALIEN ATTACK" ?