Front end problem

I have a 2001 f150 supercrew 4x4 5.4 and want to know what needs to be replaced if the front wheels are tilted IN at the top. It’s wierd that they both went out at the same time but it is what it is. Thank you for any help.

Start with an alignment, if they are tilted in at the top when turned it may be normal, if tilted in at the top when the wheels are straight you first look would be at wheel bearings, push and pull on the top of the wheel and if there is play it is probably wheel bearings, push and pull on the sides and if there is play it is probably ball joints.