The 34-year-old Sherlock Holmes star and his actress girlfriend split this March after 10 years together.
The pair met while at university together in Manchester and had recently talked about having children.
A source told the Daily Mail that they were "together for a long time but it just wasn't working anymore".
Benedict is currently starring in Danny Boyle's theatre production of Frankenstein, while Olivia has starred in political satire The Thick of It, Outnumbered and The Bill.
22,000 people agreed to clean toilets for WiFi because they did not read the terms.
Tools designed to ensure computer code in smart cars does not crash has been inspired by hungry penguins.
The rounded sleeping capsules send guests drifting into ocean before arriving on desert island by morning.
Sitting on the saddle activates the part of the brain responsible for learning, a study has claimed.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.