Brexit Secretary David Davis is making a statement to the Commons, following the prime minister's speech outlining 12 objectives for the UK to leave the European Union.
The Scottish government lead a debate on protecting Scotland's interests in negotiating our future relationship with Europe, following Theresa May's statement.
Italian MEP Antonio Tajani leads the race to become the next president of the European Parliament.
Plenary begins with Questions to the First Minister. Members vote on whether they support the next stage of devolution outlined in the Wales Bill. and a debate is held on the Local Government Settlement 2017-18.
A call for a public inquiry into the botched £1.2bn Renewable Heat Incentive scheme is debated by MLAs the day after Stormont collapses.
Brexit will dominate the week's Parliamentary statements, with anticipation over the Supreme Court ruling, and Theresa May's speech due.