Robert Pattinson and Suki Waterhouse's Romance Is Going Strong

The two were recently spotted at a London restaurant in the early hours of Tuesday.

Casual or not, Robert Pattinson and Suki Waterhouse's relationship appears to be going strong.

The two were photographed at Chiltern Firehouse, a London restaurant and club, on Tuesday night. The 32-year-old actor and 26-year-old actress left around 3 a.m., got into a waiting car and headed to a hotel, an eyewitness told E! News.

Pattinson and Waterhouse first sparked romance rumors in July, when they were spotted at a movie theater and restaurant and on a post-midnight walk in London, where they engaged in some heavy PDA. A source told E! News at the time that the two are "casually dating" and that the actor "isn't looking for anything serious right now."

In September, a source said that Pattinson and Waterhouse make time for each other in between their work requirements and have both been spending a lot of time in London together. 

The actors have not commented on the status of their relationship.

Pattinson last dated FKA twigs for three years until they split last fall. Waterhouse last year dated Diego Luna.