Shruti Haasan joins the many Indian actors at Cannes.
Swaraj also said that she is in constant touch with Indian high commission.
The police identified 2 of London attackers as Khuram Shazad Butt and Rachid Redouane.
Earlier, an 18-year-old man was arrested in the port area of Dover. None of the suspects have been named.
Metropolitan Police Acting Deputy Commissioner and Head of Counter Terrorism Mark Rowley said in a statement that a total of nine persons remain in custody and one woman has been released on bail.
"He was a quiet, nice kid who had banter with people. He was just a nice kid. I have seen some reports that say he was bullied but it was just banter - he gave back as good as he got."
The incident took place at the Parsons Green station, which has been closed.
British Prime Minister Theresa May said military personnel would replace armed police "on guard duties at certain protected sites which are not accessible to the public".
Scotland Yard said the incident is being treated as possible terror offence.
"We are not afraid. An act of terrorism tried to silence our democracy, but today we meet as normal," May said.
An attacker drove a car along a pavement in Westminster, stabbed a policeman and was shot dead by police in the grounds of Parliament.
Terrorism struck at the heart of London after a vehicle veered off the road and mowed down pedestrians on London Bridge and witnesses described men with large knives stabbing passersby at nearby Borough Market.