Second-order fluid Love number (k_2,★) of WASP-33 as a function of stellar age. Our two calculated values of k_2,★ are indicated with dotted red and blue lines, and their 1σ confidence intervals with the shaded red and blue areas. Theoretical k_2,★ values from Claret (2023) are shown for three different metallicities. In each case the solid curve is for the non-rotating case, and the dashed curve includes a correction factor for the stellar rotation (see Claret 1999). Both k_2,★ estimates are in good agreement with the theoretical expectations, although given that [Fe/H] is probably slightly supersolar, the lower estimate of k_2,★ (corresponding to the i_★ value of Watanabe et al. 2022) is in slightly better agreement.