Sylvester Stallone just doesn't give up.

The 61-year old actor, who became an international icon of machismo with the huge success of his Rocky and Rambo series, was in Tokyo, Japan [Images], yesterday to promote his latest sequel to Rambo, titled simply Rambo.

Released in January this year, Stallone's newest release grossed $6,490,000 on its opening day and $18,200,000 over its opening weekend.

Its current box office stands at $42,653,401 in the US and $101,220,852 worldwide.

Rambo is the latest film after two years since the sixth and final installment of his successful Rocky series; Rocky Balboa in 2006.

Whether we have seen last of Rambo, only time and Sly can tell.

Photograph: Getty Images