William Hague told ITV News he has joined Angelina Jolie in tackling sexual violence in conflict because "it is one of the great crimes committed in the modern world."
Speaking ahead of today's Time To Act summit, the Foreign Secretary said: "I think it is getting worse and that it will get even worse over the coming years if we don't now make a stand against this.
Angelina Jolie has told Good Morning Britain she hopes the sexual violence in war summit she is attending today will help give survivors "the respect they deserve".
Speaking about the Time To Act event, Jolie said: "There is a focus on simply people in communities and children knowing and understanding their rights and how to relate to each other.
"We're trying this holistic approach to sexual violence in conflict and make sure that we really address it."
Angela Lakor Atim, who survived years of abuse after being forced to marry a rebel soldier, hopes the Time To Act summit will help victims.Read the full story ›
Foreign Secretary William Hague said he hopes today's summit on sexual violence in war will be a "turning point" in the battle against war zone rape.
He responded to US Secretary of State John Kerry on Twittter:
UN Special Envoy and Hollywood actress Angelina Jolie will today be joined by Foreign Secretary William Hague in attending a summit on sexual violence in war, which is being held in London.
The four day event, which is called the Global Summit to End Sexual Violence in Conflict, will be held at the ExCel Centre in the capital and aims to raise awareness on the issue.
Representatives from 140 nations across the world will attend the summit, which is the largest conference ever on sexual violence in warzones.
Mr Hague, who previously said the issue "should shame all men", will call on the countries present to write action against the issue into their military training programmes.
A Ugandan victim of rape has spoken about her experience of sexual violence as a weapon of war, ahead of an international conference in London tomorrow.
Polline's voice at the conference, which is chaired by William Hague and Angelina Jolie, will help to strengthen the prosecutions of those who commit sexual violence in war.
The Government has condemned the killing of a pregnant woman by her own family in Pakistan.
Foreign Secretary William Hague said he was "shocked and appalled" at the stoning to death of Farzana Parveen, whose family were in opposition to her choice of husband.
Police said nearly 20 members of her family attacked her in broad daylight before a crowd of onlookers, in front of the high court of Lahore.
Mr Hague said there is "absolutely no honour in honour killings" and called on the Pakistani authorities to "investigate this atrocious murder fully and bring those responsible to justice".
David Cameron and Foreign Secretary William Hague have sent messages of support to the Belgian government following an armed attack at Brussels' Jewish Museum.
The Prime Minister's Office wrote on Twitter:
Foreign Secretary William Hague has tweeted:
We have offered #Nigeria surveillance aircraft, a military team and experts in analysis to help with recovery of the missing girls
Foreign Secretary William Hague is holding talks with Ukrainian leaders amid international fears the country is sliding into war.
Mr Hague praised Ukraine's "admirable" approach to democratic reform in the face of "huge Russian pressure" as talks with leaders got under way last night.
Discussed serious situation #Ukraine faces with PM Yatsenyuk. Admirable commitment to democratic reform in face of huge Russian pressure
Germany's Foreign Minister Frank-Walter Steinmeier has warned Kiev it is "a few steps away" from full blown military conflict as the death toll continues to grow from bloody clashes in the east of the country.