|Charleigh Disbrey, seen in one of the music videos she posted on YouTube|
The youngsters - one of whom has been named as 15-year-old Charleigh Disbrey - are believed to have climbed over a fence close to Elstree and Borehamwood station.
|The teenagers' friends at Hertswood Academy are being offered counselling|
There are no level crossings near the station and the deaths are not being treated as suspicious.
Miss Disbrey, a singer whose music videos have been viewed thousands of times on YouTube, was in year 10 at Hertswood Academy in Borehamwood.
The other teenager - a sixth form pupil who was midway through his A-level exams - has not yet been named.
|The teenagers were struck by a train in Borehamwood, Hertfordshire|
Their headteacher, Paul Gillett, said: "As a close community, obviously we are devastated by this tragedy. Both students were talented, hard working and well respected members of our academy.
Friends of the two teenagers paid tribute to the pair on social networking sites.
|The youngsters were struck close to Elstree and Borehamwood station|
One Twitter user wrote: "I'm actually so shocked. I saw them walking together like nearly everyday on the way to Hertswood. They looked so happy. #RIP"
A spokesman for British Transport Police said both teenagers were pronounced dead at the scene.
"Our thoughts are with the family and friends of the two teenagers involved in last night’s tragic and acutely sad incident," Superintendent Phil Wilkinson said.
"Although my officers are continuing their investigations, as part of our work to prepare a file for the local coroner, there are not thought to be any suspicious circumstances and no one else is believed to have been involved."
A First Capital Connect spokesman added: "This was a shocking incident and our hearts go out to all those involved."