The 44-year-old musician is set to release three records in 2019, and has revealed the first one - which acts as a follow-up to 2017's 'Prisoner' - will see him team up with his guitarist pal, who he teased ''brought the heat''.
Alongside a picture of the pair in the studio, which sees Ryan studiously stare at the Grammy-winner as he played the stringed instrument, the 'Oh My Sweet Carolina' singer wrote on Facebook: ''How lucky to have such an incredible, unbelievable musician and friend & a handsome one at that to play on #BigColors He brought the heat, folks, as usual. We love ya @johnmayer (sic)''
Ryan and John have often shared the stage together to perform a rendition of the former's song 'Come Pick Me Up' from his debut LP 'Heartbreaker'.
The prolific singer songwriter released a trio of records - 'Cold Roses', 'Jacksonville City Nights' and '29' - in 2005, and is set to repeat the feat this year.
Announcing his plans on Twitter, he wrote recently: ''Remember that year when I released three records? Let's do it again.''
The star also shared a clip from the studio, and added: ''It's sounding f***ing epic. Here it comes... #BigColors @bluenoterecords @CapitolRecords (sic)''
It followed a teasing post from Ryan last summer, when he shared the artwork for his 2000 debut solo album 'Heartbreaker' and hinted at a lot of unreleased material.
He wrote at the time: ''I wrote this album. I have 17 new songs.
''I have 4 records on a shelf... Does anyone want to hear... Prisoner 2 & 3... Black Hole?
''Live at Capitol Theater w v@stringdusters... Exile on Main Street cover live & rehearsal?
''I'm just asking to see if maybe I'm crazy & no one does. (sic)''
Ryan - who was previously married to Mandy Moore - is known for his prolific output and unusual covers, which have included a full re-recording of Taylor Swift's '1989' LP, and he has admitted in the past that he just wants to make music that moves him and get it out to his fans.
He tweeted: ''I have amazing fans. I want them to be able to hear my songs while I'm here. Released my way. To play them for you live. Every artist is different.
''I make a lot of music. It's time to be who I am. Songs are gifts. Music heals. Cold Roses was written & recorded in 2 weeks. FYI (sic)''
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