Parents who force their children to marry will face jail under new laws, the Home Secretary will announce tomorrow.
Theresa May will announce plans to make forced marriage a criminal offence in England, Wales and Northern Ireland.
It comes after warnings that up to 8,000 young women a year are forced into marriages without their consent.
But campaigners have warned that criminalising forced marriage altogether could deter victims from coming forward.
The Home Office consultation, which closed at the end of March, was launched at the request of Prime Minister David Cameron, who said last year that forced marriage was "little more than slavery" and "completely wrong".
The new law is expected to distinguish between arranged marriages and forced marriages where there is no consent.
May is also expected to announce a £500,000 fund to help schools and other agencies know how to spot early signs of a forced marriage.
A Government advertising campaign will also aim to highlight the right to choose who you marry.
An Egyptian child with the colours of his national flag painted on his face attends a protest against the verdicts handed down in ex-president Hosni Mubarak's murder trial in Cairo's landmark Tahrir Square on June 6, 2012. Mubarak, 84, and his interior minister Habib al-Adly were sentenced to life in prison on June 2, but six security chiefs were acquitted of the killings of demonstrators during last year's uprising that left some 850 people dead and ousted the veteran president. (Photo credit: MOHAMMED ABED/AFP/GettyImages)
The headstone for the final resting place of US science fiction writer Ray Bradbury is seen at Westwood Village Memorial Park Cemetery in Los Angeles, California, June 6, 2012. Bradbury, whose dystopian works served as cautionary tales about perilous futures and reflected the anxieties of post-war America, died June 5, 2012 after a long illness. He was 91. (Photo credit: ROBYN BECK/AFP/GettyImages)
An F-16 drops chaff cartridges during the "Lien Yung" annual joint forces exercises, Thursday, June 7, 2012 in Pingtung County, southern Taiwan. (Photo credit: AP Photo/Wally Santana)
A white phosphorous shell explodes on target during the "Lien Yung" annual joint forces exercises, Thursday, June 7, 2012 in Pingtung County, southern Taiwan. (Photo credit: AP Photo/Wally Santana)
A Kashmiri boatman rows a boat while a passenger holds an umbrella during rain on Dal Lake in Srinagar on June 7, 2012. Thousands of holiday goers have arrived in Kashmir valley to enjoy the beauty of its landscapes, as violence ebbs in the Muslim-majority state wracked by insurgency since 1989. An armed insurgency against Indian rule in Kashmir has claimed 47,000 lives since 1989 with separatists putting the toll twice as high. (Photo credit: TAUSEEF MUSTAFA/AFP/GettyImages)
U.S. Secretary of Defense Leon Panetta (C) speaks with U.S. Ambassador to Afghanistan Ryan Crocker (2nd R) and the head of NATO coalition forces in Afghanistan General John Allen (3rd L) as he arrives at Kabul International Airport on June 7, 2012 in Kabul, Afghanistan. Panetta's arrival in the Afghan capital, on an unannounced trip to review the status of the war and to discuss troop draw-down plans, is taking place in the wake of a suicide attack in the capital and reports of an errant NATO airstrike killing civilians in the south of the country the previous day. (Photo credit: Jim Watson - Pool/Getty Images)
Environmental activists from Greenpeace dressed as 'coal demons' protest in front of the Asian Development Bank (ADB) during the 7th Annual Clean Energy meeting in Manila on June 7, 2012. The coal demons, painted black, called on the ADB to stop funding projects using coal in the Philippines, Indonesia, Thailand and Vietnam. (Photo credit: JAY DIRECTO/AFP/GettyImages)
Russia's national football team cheerleaders perform as the team fans departure to Poland for the Euro 2012 football championship at Belarus railway station in Moscow, on June 7, 2012. The special destination train will deliver the Russian team's fans to the first match against Czech Republic. (Photo credit: KIRILL KUDRYAVTSEV/AFP/GettyImages)
Oklahoma City Thunder guard James Harden (13) celebrates after hitting a 3-pointer as San Antonio Spurs small forward Kawhi Leonard (2) walks away during the second half of Game 6 in the NBA basketball Western Conference finals, Wednesday, June 6, 2012, in Oklahoma City. The Thunder won 107-99. (Photo credit: AP Photo/Sue Ogrocki)