United Kingdom, Jan. 22 -- Sarah Michelle Gellar and Freddie Prinze Jr. use "separate bathrooms".

The 48-year-old actress has been married to the 49-year-old actor since 2002, and Sarah says a bathroom for each of them to do their business in is what keeps their marriage going strong.

She told E! News: "Separate bathrooms. That's what I always say."

Meanwhile, Chrissy Teigen - Sarah's fellow judge on the Netflix talent show competition, Star Search - agreed and revealed she and her 47-year-old husband, singer John Legend, follow a similar rule.

The 40-year-old model - who has been married to the All of Me hitmaker since 2013 - joined Sarah on the red carpet of the programme's premiere, and explained to E! News: "It is little things li...