Hamilton has been taking part in his first official timed sessions with Ferrari this week during testing, following his departure from his former Mercedes team at the end of 2024.
Alongside the supremely talented Leclerc, Hamilton is hoping to power Ferrari to their first world championship title of any kind since 2008, while the Brit is himself looking for a record-breaking eighth world championship.
Lewis Hamilton and Charles Leclerc are now F1 team-matesF1 pre-season testing in Bahrain has almost concluded
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Ferrari are one of the favourites to claim both the drivers' and constructors' championships in 2025 in what appears to be a wide-open championship battle in both standings.
The true potential of each team's machinery cannot be determined from testing results alone but having said that, the Scuderia have started pre-season testing off strongly.
Each testing session is four hours long, resulting in eight hours of testing opportunities each day, with Ferrari deciding so far to equally split the days between their two drivers.
However, while seven-time champion Hamilton was driving the car on Thursday, Sky Sports F1 commentators noticed Leclerc getting some shut-eye in the Ferrari garage.
"Charles Leclerc, wake up! The season has started fella," broadcaster David Croft proclaimed as the camera panned to Leclerc with his eyes closed.
Co-commentator Natalie Pinkham countered: "I think he might be meditating, you can’t be sleeping when there are that many people watching you!"
Leclerc then finally opened his eyes, much to the delight of Pinkham: "There he is! He was just having a little stretch."