The 95-Test-capped Beale will replace Hunter Paisami, who is unavailable for the Spring Tour due to personal reasons.
Wallaby number 836, Beale, was last named in a Wallabies squad in 2024 before an Achilles injury prematurely ended his season. His last appearance in the gold jersey was against Wales in Cardiff in 2021.
Meanwhile Ramm, who will link with the Western Force ahead of 2027 Super Rugby Pacific season, joins the group having most recently having played a key role in Northland's run to the NPC final in New Zealand.
The 28-year-old who can play fullback and wing, was also part of the Northampton Saints squads that won the Prem Rugby title last season and in 2023/24.
Thomas will meet up with the squad after his Australia A commitments, with Tate McDermott expected to have to return to Australia for the arrival of his first child back during November.
The squad will depart for the UK on Saturday.
"With Hunter's unavailability, we're excited by what Kurtley can bring to the group," said Wallabies coach Les Kiss.
"He's got 95 caps worth of Test experience and whilst he will primarily cover inside centre, he has the versatility to play a number of positions across the backline.
"Kurtley's also been in great form for the Western Force in Super Rugby Pacific and Super Rugby AUS and is excited to contribute to the environment.
"At the same time, James is a player we've kept a keen eye on for a while and his form for Northland has been exceptional in recent times.
"He's someone who knows the UK well having spent a very successful period with Northampton and can cover multiple positions across the backline."