Tony Bennett was seen heading to New York's Radio City Music Hall on Tuesday evening ahead of his first of two shows with collaborator Lady Gaga.

Hours prior, Lady Gaga took to Instagram to share a heartfelt tribute to Tony on his special day, as well as to unveil the cover and other details about their forthcoming album Love For Sale, which comes out October 1st.

It's showtime! Tony Bennett was seen leaving for the first of two shows with his collaborator Lady Gaga at Radio City Music Hall on Tuesday night.

For Tony and Gaga's big night, Susan turned heads in a stunning mint green gown that exposed her enviably toned arms.

Stunning; For Tony and Gaga's big night, Susan turned heads in a stunning mint green gown that exposed her enviably toned arms!

One last rehearsal: Earlier in the day, Tony was seen getting in one last rehearsal before taking the stage with Gaga.

Earlier in the day, Tony was seen getting in one last rehearsal before taking the stage with Gaga. .

Dedication: Hours prior, Lady Gaga took to Instagram to share a heartfelt tribute to Tony on his special day.

Bennett and Gaga are playing the first of two shows at New York’s Radio City Music Hall on Tuesday night.

The concerts, billed as One Last Time: An Evening With Tony Bennett And Lady Gaga, were called the 'last NYC performances of [Bennett’s] career' in a press release.

Ahead of their highly-anticipated showcase, Lady Gaga shared a sweet birthday post in dedication to her 'musical companion' Tony.

Iconic: Bennett and Gaga are playing the first of two shows at New York’s Radio City Music Hall on Tuesday night.

Enjoying every moment: As her makeup was being applied, Gaga could be seen sipping on a glass of champagne.

Sweet friendship: Lady Gaga shared a sweet birthday message for friend and collaborator Tony Bennett to mark his 95th birthday on Tuesday

Underneath the snap, she offered fans the opportunity to help celebrate the show tune pro's birthday, which was also recently declared Tony Bennett Day by New York Governor Andrew Cuomo

To celebrate him and the love all of his fans have for him, I'm making a special video with 95 Reasons Gaga, Little Monsters, and Bennett Monsters love Tony

That same day, Gaga debuted the cover for their second album collaboration, a collection of Cole Porter tributes titled Love For Sale