An ambitious young actor begins a passionate love affair with a washed-up but wealthy older actress, however, her family suspect he’s a gold-digger and set out to undermine his career.

I like the idea. I think the family, rather than think he's a gold-digger, think he's just trying to take advantage of her to advance his career. This can include using her money but I think it's important, since you've called him 'ambitious', for that ambition to be outwardly visible by his family. It makes total sense for them to be wary plus, since we're not including the ending, it also makes the audience ask the question "is he just using her?" - that, to me, is interesting.

The only other thing I wonder, is how the family can undermine his career. I think it would be better if they try and stop the relationship at every turn. This in turn causes problems for his career. That makes more sense to me.

Hope this helps.

I agree... "ambitious" saves your word count over "trying to break into Hollywood" and carries plenty of weight.

I love the idea - looking at insecurities and manipulation from many different viewpoints is something (as an audience!) I relish... it can be especially heart-rending when we don't find out until the end that we've been manipulated too - e.g. family were in it for themselves and he actually loved her.

Who is the lead character, The young actor? The Older Actor? Or the suspicious family member? Who's point of view are we seeing this story from?