Rob Lowe gets candid about his best on-screen kiss as other major stars dish on their worst

Celebrities are getting real about their best and worst on-screen smooches.

Rob Lowe recently praised one of his former co-stars as the best on-screen kiss of his career, while Nicole Kidman previously roasted one of her former screen partners as her worst.

Whether it was the circumstances surrounding the shoot, the chemistry between the actors or a co-star's choices at lunch, these star's share what can make or break a romantic scene for them.

Here are some stars who have disclosed their best and worst on-screen kisses.