President Obama discovered it takes two to tango Wednesday evening as he engaged in a bit of dance diplomacy with a stunning partner at a state dinner in ­Buenos Aires, Argentina.

The president and first lady Michelle were dining in the capital when they were pulled abruptly onto the dance floor by two accomplished performers.

A dancer in a shimmering gold dress made a beeline for the president and beckoned him into the spotlight. Obama initially demurred, but she finally coaxed him up.

Hundreds looked on as a stone-faced Obama stumbled through the steps a bit, but eventually caught on to the moves.

The first lady got in on the action, too, smiling broadly as she twisted back and forth with a dapper, dark-clad dancer.

The unexpected moment came at the end of a candlelit dinner that Argentine President Mauricio Macri hosted for the Obamas. It had been nearly 20 years since a US president last made a formal state visit to the South American nation.

Elegant, slow-moving and sensuous, the tango has its roots in Argentina’s capital, which hosts annual festivals for devotees from around the world.

Obama’s visit to the nation came on the heels of his historic trip to Cuba earlier this week.

With Post wire services