to grow old (also age) gracefully:
to accept or embrace the changes caused by ageing; to present or conduct oneself in an elegant or dignified manner as one grows older. Also in extended use.
1799 H. More Strictures Mod. Syst. Female Educ. I. 59 Since then there is a season when the youthful must cease to be young, and the beautiful to excite admiration; to grow old gracefully is perhaps one of the rarest and most valuable arts which can be taught to woman.
1835 Mrs. O'Neill Bondman 104 A woman who knew not what it was to grow old gracefully, and who haunted youthful pleasures with a wrinkled brow, a flaxen wig, and a painted cheek.
1900 F. Bullock Old Town on River 1 Others of these frontier citadels had vitality enough to live, to thrive, and eventually to grow old gracefully.
1944 San Antonio (Texas) Light 13 Feb. 39/7 Broadway actresses who refuse to age gracefully, hoping to continue to snare glamour girl roles.
2013 Irish Independent (Nexis) 19 Apr. 37 She has no intention of growing old gracefully and plans to wear revealing clothes and lashings of makeup till the very end.