One of parliament's most senior MPs is to attend a global conference for young parliamentarians.

69-year-old Labour deputy leader Annette King joins New Zealand First MP Tracey Martin, National MP Andrew Bayly, and Gareth Hughes on the trip to Zambia later this week.

There they'll attend a Global Conference of Young Parliamentarians, as well as an assembly of the Inter Parliamentary Union.

They'll take part in discussions on involving youth in democracy.

Gareth Hughes is the only member of the delegation aged under 35.

Meanwhile National MP Jonathan Young is heading to London for a conference on sustainability, energy, and development.