While Saka is on the verge of a half-century of appearances, Bellingham is not far behind.
The midfielder currently has 48 caps and is set to become England's youngest-ever player to reach 50 appearances if he features twice during the tournament. Rooney has held the record since April 2009, when he brought up his 50th cap aged 23 years and 159 days.
Bellingham, who made his England debut as a 17 year old in November 2020, would comfortably surpass that mark and add another milestone to a career that has already seen him feature at three major international tournaments.
The 22-year-old could also move to within one victory of another Three Lions record. England have won 32 of Bellingham's first 48 appearances, already matching the tally achieved by several established internationals across their first 50 caps.
Victory over Croatia would move him onto 33 wins from 49 caps, while another England win in what could be his 50th appearance would take him to 34 victories.
Only Martin Peters, Steven Gerrard and Tom Finney have recorded more wins in their first 50 England appearances, with each registering 35.
The Three Lions begin their tournament against Croatia on Wednesday before taking on Ghana in their second Group L fixture six days later, with both Saka and Bellingham closing in on places in the England record books.