Gleeful girls celebrated a bumper crop of exam results at The Sacred Heart Language College in High Street, Wealdstone.
Wendy Muruci, 16, said: “I got four A*S and six As. All of the girls have congratulated me but everyone’s done really well.
“My sister took the exams about three years ago and she said they appeared harder than when she had to do them.”
Tiffany Fernando excelled in the classroom despite only arriving in Britain two years ago from the Sri Lankan capital Colombo.
The 17-year-old said: “I came when I was 15 and I didn’t know anyone. Tamil is my first language.
“In the beginning I had extra tutorials and support for the core subjects and I picked up English quite quickly.
“My results were better than I expected.”
Among the school’s top performers was Roisin Murphy, 16, whose eight A*s and one A mirrored those of best friend, and deputy head girl, Alice Conway.
Roisin said: “I found the support of the school great all round. The teachers always knew how to push me.”
Headteacher Geraldine Higgins said: “We’re delighted with the results and are proud of all the achievements of the pupils.
“It’s down to commitment and hard work.”
Eighty-one per cent of pupils achieved five or more GCSEs at A* to C grade including English and maths, and 90 per cent earned five or more A*to Cs.