Jackie Doyle-Price, parliamentary under-secretary of state for mental health and Inequalities said: 'Organ donation saves lives.
The law change follows a consultation previous year which showed the public are overwhelmingly in favour of organ donation, but only a minority have registered as organ donors.
People who don not want to donate their organs will be able to register their decision through NHS websites, phone calls, and an app which will launch at the end of this year.
Anyone can join the NHS Organ Donor Register, age and medical conditions are not necessarily a barrier to donation.
Asked by the news anchor whether it would give doctors licence to take your organs, the medical ethicist said: "Sometimes if there is no known wish a doctor can approach relatives and some relatives decide not to donate".
But Mr Beggs warned that unless it is also extended here, Northern Ireland will soon be the only part of the United Kingdom without an opt-out system.
"I've always been a supporter of organ donation, it's such a noble thing to do for people to give that gift - it really is the gift of life", he added.
"We believe that by making these changes, we can save as many as 700 more lives every year".
Some 411 people in the United Kingdom died while on the waiting list for transplants in 2017. "I want to encourage people who wish to give life in the event of their death to take the time to record their wishes and discuss it with their family".
Kirit Mistry, co-chair of the National BAME Transplant Alliance and chair of South Asian Health Action Charity, said: "If people don't discuss their wishes with their loved ones and positively engaging with the new system of consenting for organ donation, our own people will be consigned to years of unnecessary treatment, such as dialysis".
The legislation was introduced in Parliament last July and is expected to return to the House of Commons in the autumn.
The register will also include an option for people to state their faith, if it is important to their decision.
Fiona Loud, policy director at Kidney Care UK, said: "Patients are dying every day while they wait for a transplant, so we welcome the commitment to change our system so more lives can be transformed".
Northern Ireland will soon be the only part of the United Kingdom without an opt-out organ donation system, the Ulster Unionists have warned.