United Kingdom, July 19 -- Tom Cruise has been an "incredible mentor" to Ana de Armas.

The 63-year-old actor and Ana, 37, have a "special work relationship" and the actress has "prepped" all summer for their first project together - a supernatural ocean thriller called Deeper.

A source told People: "Tom is crazy hardworking and she's very excited to work with him. She calls it an opportunity of a lifetime."

Tom and Ana have been romantically linked to each other over recent months. However, an insider has insisted that their relationship is "not romantic" and that they are simply friends and work partners.

The source shared: "Tom is an incredible mentor to Ana. She has nothing but amazing things to say about him."

Tom is still one of...