London Irish's Johnny Williams says his opportunities in the first team have happened "within the blink of an eye".
The 19-year-old, who was playing for Henley Rugby Club last summer, has continued his impressive form since a man-of-the-match performance against Agen in November.
"It has come along so quickly," said Williams, a product of the club's prestigious academy.
"But credit to the coaches for giving me a shot."
The Reading-born centre is expected to start against Bath this weekend, a game he describes as "a great opportunity to test myself against international players".