Reconciliation between Harry, Meghan, William, and Kate has a "glimmer of hope."

A royal expert, Grant Harrold, believes it's "highly unlikely" to happen soon.

Harrold suggests it could be a PR stunt, with actions speaking louder than words.

Key signs of improvement would include them being seen together in public.

Examples include driving together, visiting each other, or attending events.

Harry and William have been estranged for several years.

Harry detailed their rift in his memoir and the Netflix show "Harry & Meghan."

He claimed William physically attacked him in 2019.

Reconciliation seems distant, but small signs could indicate progress.